feat: add common config snippet management system

- Add settings module for managing common configuration snippets
- Implement UI for creating, editing, and deleting snippets
- Add tauri-plugin-fs for file operations
- Replace co-authored setting with flexible snippet system
- Enable users to define custom config snippets for frequently used settings

src-tauri/Cargo.toml

@@ -28,6 +28,7 @@ tauri-plugin-process = "2"
 tauri-plugin-updater = "2"
 dirs = "5.0"
 toml = "0.8"
+tauri-plugin-dialog = "2"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 objc2 = "0.5"