feat: Add support for new OS package

- Add a new `sal-os` package containing OS interaction utilities.
- Update workspace members to include the new package.
- Add README and basic usage examples for the new package.

Cargo.toml

@@ -11,7 +11,7 @@ categories = ["os", "filesystem", "api-bindings"]
 readme = "README.md"
 
 [workspace]
-members = [".", "vault", "git", "redisclient", "mycelium", "text"]
+members = [".", "vault", "git", "redisclient", "mycelium", "text", "os"]
 
 [dependencies]
 hex = "0.4"
@@ -64,6 +64,7 @@ sal-git = { path = "git" }
 sal-redisclient = { path = "redisclient" }
 sal-mycelium = { path = "mycelium" }
 sal-text = { path = "text" }
+sal-os = { path = "os" }
 
 # Optional features for specific OS functionality
 [target.'cfg(unix)'.dependencies]