Add DataFolders component to ServerSettings for managing system folder paths

- Introduced a new DataFolders component to display and manage paths for application data, models, and providers.
- Implemented a FolderRow component for individual folder display, including loading states and open folder functionality.
- Added API client methods and hooks to fetch system folder paths from the backend.
- Updated ServerTab to include the new DataFolders component, enhancing server settings management.

web/src/platform/filesystem.ts

@@ -12,4 +12,10 @@ export const webFilesystem: PlatformFilesystem = {
     window.URL.revokeObjectURL(url);
     document.body.removeChild(a);
   },
+
+  async openFolder(_path: string): Promise<boolean> {
+    // Browsers cannot open local folders for security reasons
+    // The UI will show the path as a read-only text instead
+    return false;
+  },
 };