feat: readme add install description

Author: 晴知

README.md

@@ -82,6 +82,12 @@ Whether it's generating text, images, or audio, ComfyUI-Copilot offers intuitive
    cd ComfyUI/custom_nodes
    git clone https://github.com/AIDC-AI/ComfyUI-Copilot
    ```
+   
+   or
+   **Using ComfyUI Manager**: Open ComfyUI Manager, click on Custom Nodes Manager, search for ComfyUI-Copilot, and click the install button.
+   <img src="assets/comfyui_manager.png"/>
+   <img src="assets/comfyui_manager_install.png"/>
+
 2. **Activation**: After running the ComfyUI project, find the Copilot activation button at the top-right corner of the board to launch its service.
 <img src="assets/start.png"/>