feat(UI): Introduce new UI components for file attachments and related views (#191)

Add file management API and UI components
Implement directory listing, search and CRUD operations in desktop backend
Expose new Files API on frontend to list, search, and modify files

packages/vscode/webview/api/files.ts

@@ -61,6 +61,20 @@ export const createVSCodeFilesAPI = (): FilesAPI => ({
     };
   },
 
+  async delete(path: string): Promise<{ success: boolean }> {
+    const target = normalizePath(path);
+    const data = await sendBridgeMessage<{ success: boolean }>('api:fs:delete', { path: target });
+    return { success: Boolean(data?.success) };
+  },
+
+  async rename(oldPath: string, newPath: string): Promise<{ success: boolean; path: string }> {
+    const data = await sendBridgeMessage<{ success: boolean; path: string }>('api:fs:rename', { oldPath, newPath });
+    return {
+      success: Boolean(data?.success),
+      path: typeof data?.path === 'string' ? normalizePath(data.path) : newPath,
+    };
+  },
+
   async readFile(path: string): Promise<{ content: string; path: string }> {
     const target = normalizePath(path);
     const data = await sendBridgeMessage<{ content: string; path: string }>('api:fs:read', { path: target });