feat: Add PostgreSQL and Redis client support

- Add PostgreSQL client functionality for database interactions.
- Add Redis client functionality for cache and data store operations.
- Extend Rhai scripting with PostgreSQL and Redis client modules.
- Add documentation and test cases for both clients.

src/rhai/redisclient.rs

@@ -37,6 +37,8 @@ pub fn register_redisclient_module(engine: &mut Engine) -> Result<(), Box<EvalAl
     // Register other operations
     engine.register_fn("redis_reset", redis_reset);
 
+    // We'll implement the builder pattern in a future update
+
     Ok(())
 }
 
@@ -321,3 +323,5 @@ pub fn redis_reset() -> Result<bool, Box<EvalAltResult>> {
         ))),
     }
 }
+
+// Builder pattern functions will be implemented in a future update