feat(lsp): implement auto-provisioning for language servers

- Added LSP auto-provisioning functionality to automatically install and connect language servers.
- Introduced `shutdown_lsp` method to cleanly shut down LSP servers on application exit.
- Enhanced `AppStateRest` to spawn a background thread for provisioning language servers.
- Updated `builtin_agents` to include new LSP-related agents.
- Modified settings to include options for LSP auto-provisioning and supported languages.
- Updated file editing and writing tools to notify LSP servers of changes.
- Enhanced LSP tools to support auto-detection of servers based on file extensions.
- Added utility functions for managing known file extensions and resolving server names.
- Created a new `provisioner` module to handle the provisioning logic for various language servers.

src/app/runtime/actions/mod.rs

@@ -100,6 +100,7 @@ pub fn apply_action(state: &mut AppStateRest, action: Action) {
     match action {
         Action::ForceQuit => {
             save_current_session(state);
+            state.shutdown_lsp();
             state.quit = true;
         }
         Action::SwitchMode(mode) => {