feat: integrate @tailwindcss/typography and enhance folder picker functionality

- Added @tailwindcss/typography dependency to package.json and tailwind.config.js.
- Updated FolderPicker.vue to include additional properties (isGitRepo, hasDocuments) for directories.
- Enhanced Sidebar.vue with folder creation and document handling features, including drag-and-drop functionality.
- Implemented createFolder and moveDocument mutations in gql.ts for managing folder and document operations.
- Added logic to handle folder creation and document creation prompts in Sidebar.vue.
- Updated the layout and interactions in Sidebar.vue to improve user experience.

frontend/tailwind.config.js

@@ -19,5 +19,7 @@ export default {
       },
     },
   },
-  plugins: [],
+  plugins: [
+    require('@tailwindcss/typography'),
+  ],
 }