feat: Migrate SAL to Cargo workspace

- Migrate individual modules to independent crates
- Refactor dependencies for improved modularity
- Update build system and testing infrastructure
- Update documentation to reflect new structure

os/Cargo.toml

@@ -11,26 +11,22 @@ categories = ["os", "filesystem", "api-bindings"]
 
 [dependencies]
 # Core dependencies for file system operations
-dirs = "6.0.0"
-glob = "0.3.1"
-libc = "0.2"
+dirs = { workspace = true }
+glob = { workspace = true }
+libc = { workspace = true }
 
 # Error handling
-thiserror = "2.0.12"
+thiserror = { workspace = true }
 
 # Rhai scripting support
-rhai = { version = "1.12.0", features = ["sync"] }
+rhai = { workspace = true }
 
 # Optional features for specific OS functionality
 [target.'cfg(unix)'.dependencies]
-nix = "0.30.1"
+nix = { workspace = true }
 
 [target.'cfg(windows)'.dependencies]
-windows = { version = "0.61.1", features = [
-    "Win32_Foundation",
-    "Win32_System_Threading", 
-    "Win32_Storage_FileSystem",
-] }
+windows = { workspace = true }
 
 [dev-dependencies]
-tempfile = "3.5"
+tempfile = { workspace = true }