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/model/settings.rs

@@ -40,6 +40,8 @@ pub struct Settings {
     pub verify_timeout_ms: u64,
     pub workflow_max_concurrency: usize,
     pub session_archive_enabled: bool,
+    pub lsp_auto_provision: bool,
+    pub lsp_languages: Vec<String>,
 }
 
 impl Default for Settings {
@@ -58,6 +60,8 @@ impl Default for Settings {
             verify_timeout_ms: 30000,
             workflow_max_concurrency: 5,
             session_archive_enabled: true,
+            lsp_auto_provision: true,
+            lsp_languages: Vec::new(),
         }
     }
 }