Update README to the toolkit

Removed unused JupyterLab command tools from README.

Author: jtpio

README.md

@@ -45,8 +45,8 @@ c.MCPExtensionApp.mcp_tools = [
     "jupyter_ai_tools.toolkits.notebook:edit_cell",
 
     # JupyterLab Commands Toolkit
-    "jupyterlab_commands_toolkit.tools:clear_all_outputs_in_notebook",
-    "jupyterlab_commands_toolkit.tools:open_document",
+    "jupyterlab_commands_toolkit.tools:list_all_commands",
+    "jupyterlab_commands_toolkit.tools:execute_command",
 ]
 ```
 
@@ -214,4 +214,4 @@ jupyter_server_mcp/
 2. Create a feature branch
 3. Add tests for new functionality  
 4. Ensure all tests pass: `pytest tests/`
-5. Submit a pull request
+5. Submit a pull request