Resolve merge conflicts - keep production-ready service manager implementation

- Resolved conflicts in service_manager/src/lib.rs
- Resolved conflicts in service_manager/src/launchctl.rs
- Resolved conflicts in service_manager/src/zinit.rs
- Resolved conflicts in service_manager/README.md
- Kept our production-ready synchronous API design
- Maintained comprehensive service lifecycle management
- Preserved cross-platform compatibility (macOS/Linux)
- All tests passing and ready for production use

service_manager/examples/README.md

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+# Service Manager Examples
+
+This directory contains examples demonstrating the usage of the `sal-service-manager` crate.
+
+## Running Examples
+
+To run any example, use the following command structure from the `service_manager` crate's root directory:
+
+```sh
+cargo run --example <EXAMPLE_NAME>
+```
+
+---
+
+### 1. `simple_service`
+
+This example demonstrates the ideal, clean lifecycle of a service using the separated `create` and `start` steps.
+
+**Behavior:**
+1.  Creates a new service definition.
+2.  Starts the newly created service.
+3.  Checks its status to confirm it's running.
+4.  Stops the service.
+5.  Checks its status again to confirm it's stopped.
+6.  Removes the service definition.
+
+**Run it:**
+```sh
+cargo run --example simple_service
+```
+
+### 2. `service_spaghetti`
+
+This example demonstrates how the service manager handles "messy" or improper sequences of operations, showcasing its error handling and robustness.
+
+**Behavior:**
+1.  Creates a service.
+2.  Starts the service.
+3.  Tries to start the **same service again** (which should fail as it's already running).
+4.  Removes the service **without stopping it first** (the manager should handle this gracefully).
+5.  Tries to stop the **already removed** service (which should fail).
+6.  Tries to remove the service **again** (which should also fail).
+
+**Run it:**
+```sh
+cargo run --example service_spaghetti
+```

service_manager/examples/service_spaghetti.rs

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+//! service_spaghetti - An example of messy service management.
+//!
+//! This example demonstrates how the service manager behaves when commands
+//! are issued in a less-than-ideal order, such as starting a service that's
+//! already running or removing a service that hasn't been stopped.
+
+use sal_service_manager::{create_service_manager, ServiceConfig};
+use std::collections::HashMap;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    let manager = create_service_manager(None).expect("Failed to create service manager");
+    let service_name = "com.herocode.examples.spaghetti";
+
+    let service_config = ServiceConfig {
+        name: service_name.to_string(),
+        binary_path: "/bin/sh".to_string(),
+        args: vec![
+            "-c".to_string(),
+            "while true; do echo 'Spaghetti service is running...'; sleep 5; done".to_string(),
+        ],
+        working_directory: None,
+        environment: HashMap::new(),
+        auto_restart: false,
+    };
+
+    println!("--- Service Spaghetti Example ---");
+    println!("This example demonstrates messy, error-prone service management.");
+
+    // Cleanup from previous runs to ensure a clean slate
+    if let Ok(true) = manager.exists(service_name) {
+        println!("\nService '{}' found from a previous run. Cleaning up first.", service_name);
+        let _ = manager.stop(service_name);
+        let _ = manager.remove(service_name);
+        println!("Cleanup complete.");
+    }
+
+    // 1. Create the service
+    println!("\n1. Creating the service...");
+    match manager.create(&service_config) {
+        Ok(()) => println!("   -> Success: Service '{}' created.", service_name),
+        Err(e) => {
+            eprintln!("   -> Error: Failed to create service: {}. Halting example.", e);
+            return;
+        }
+    }
+
+    // 2. Start the service
+    println!("\n2. Starting the service for the first time...");
+    match manager.start(service_name) {
+        Ok(()) => println!("   -> Success: Service '{}' started.", service_name),
+        Err(e) => {
+            eprintln!("   -> Error: Failed to start service: {}. Halting example.", e);
+            return;
+        }
+    }
+
+    thread::sleep(Duration::from_secs(2));
+
+    // 3. Try to start the service again while it's already running
+    println!("\n3. Trying to start the *same service* again...");
+    match manager.start(service_name) {
+        Ok(()) => println!("   -> Unexpected Success: Service started again."),
+        Err(e) => eprintln!("   -> Expected Error: {}. The manager should detect it is already running.", e),
+    }
+
+    // 3. Let it run for a bit
+    println!("\n3. Letting the service run for 5 seconds...");
+    thread::sleep(Duration::from_secs(5));
+
+    // 4. Remove the service without stopping it first
+    // The `remove` function is designed to stop the service if it's running.
+    println!("\n4. Removing the service without explicitly stopping it first...");
+    match manager.remove(service_name) {
+        Ok(()) => println!("   -> Success: Service was stopped and removed."),
+        Err(e) => eprintln!("   -> Error: Failed to remove service: {}", e),
+    }
+
+    // 5. Try to stop the service after it has been removed
+    println!("\n5. Trying to stop the service that was just removed...");
+    match manager.stop(service_name) {
+        Ok(()) => println!("   -> Unexpected Success: Stopped a removed service."),
+        Err(e) => eprintln!("   -> Expected Error: {}. The manager knows the service is gone.", e),
+    }
+
+    // 6. Try to remove the service again
+    println!("\n6. Trying to remove the service again...");
+    match manager.remove(service_name) {
+        Ok(()) => println!("   -> Unexpected Success: Removed a non-existent service."),
+        Err(e) => eprintln!("   -> Expected Error: {}. The manager correctly reports it's not found.", e),
+    }
+
+    println!("\n--- Spaghetti Example Finished ---");
+}

service_manager/examples/simple_service.rs

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+use sal_service_manager::{create_service_manager, ServiceConfig};
+use std::collections::HashMap;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    // 1. Create a service manager for the current platform
+    let manager = match create_service_manager(None) {
+        Ok(manager) => manager,
+        Err(e) => {
+            eprintln!("Error: Failed to create service manager: {}", e);
+            return;
+        }
+    };
+
+    // 2. Define the configuration for our new service
+    let service_name = "com.herocode.examples.simpleservice";
+    let service_config = ServiceConfig {
+        name: service_name.to_string(),
+        // A simple command that runs in a loop
+        binary_path: "/bin/sh".to_string(),
+        args: vec![
+            "-c".to_string(),
+            "while true; do echo 'Simple service is running...'; date; sleep 5; done".to_string(),
+        ],
+        working_directory: None,
+        environment: HashMap::new(),
+        auto_restart: false,
+    };
+
+    println!("--- Service Manager Example ---");
+
+    // Cleanup from previous runs, if necessary
+    if let Ok(true) = manager.exists(service_name) {
+        println!("Service '{}' already exists. Cleaning up before starting.", service_name);
+        if let Err(e) = manager.stop(service_name) {
+            println!("Note: could not stop existing service (it might not be running): {}", e);
+        }
+        if let Err(e) = manager.remove(service_name) {
+            eprintln!("Error: failed to remove existing service: {}", e);
+            return;
+        }
+        println!("Cleanup complete.");
+    }
+
+    // 3. Create the service
+    println!("\n1. Creating service: '{}'", service_name);
+    match manager.create(&service_config) {
+        Ok(()) => println!("Service '{}' created successfully.", service_name),
+        Err(e) => {
+            eprintln!("Error: Failed to create service '{}': {}", service_name, e);
+            return;
+        }
+    }
+
+    // 4. Start the service
+    println!("\n2. Starting service: '{}'", service_name);
+    match manager.start(service_name) {
+        Ok(()) => println!("Service '{}' started successfully.", service_name),
+        Err(e) => {
+            eprintln!("Error: Failed to start service '{}': {}", service_name, e);
+            return;
+        }
+    }
+
+    // Give it a moment to run
+    println!("\nWaiting for 2 seconds for the service to initialize...");
+    thread::sleep(Duration::from_secs(2));
+
+    // 4. Check the status of the service
+    println!("\n2. Checking service status...");
+    match manager.status(service_name) {
+        Ok(status) => println!("Service status: {:?}", status),
+        Err(e) => eprintln!("Error: Failed to get status for service '{}': {}", service_name, e),
+    }
+
+    println!("\nLetting the service run for 10 seconds. Check logs if you can.");
+    thread::sleep(Duration::from_secs(10));
+
+    // 5. Stop the service
+    println!("\n3. Stopping service: '{}'", service_name);
+    match manager.stop(service_name) {
+        Ok(()) => println!("Service '{}' stopped successfully.", service_name),
+        Err(e) => eprintln!("Error: Failed to stop service '{}': {}", service_name, e),
+    }
+
+    println!("\nWaiting for 2 seconds for the service to stop...");
+    thread::sleep(Duration::from_secs(2));
+
+    // Check status again
+    println!("\n4. Checking status after stopping...");
+    match manager.status(service_name) {
+        Ok(status) => println!("Service status: {:?}", status),
+        Err(e) => eprintln!("Error: Failed to get status for service '{}': {}", service_name, e),
+    }
+
+    // 6. Remove the service
+    println!("\n5. Removing service: '{}'", service_name);
+    match manager.remove(service_name) {
+        Ok(()) => println!("Service '{}' removed successfully.", service_name),
+        Err(e) => eprintln!("Error: Failed to remove service '{}': {}", service_name, e),
+    }
+
+    println!("\n--- Example Finished ---");
+}