docs: add ccr ui command to README

- Add documentation for the `ccr ui` command to both the English and Chinese README files.

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Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -166,6 +166,16 @@ ccr code
 > ccr restart
 > ```
 
+### 4. UI Mode
+
+For a more intuitive experience, you can use the UI mode to manage your configuration:
+
+```shell
+ccr ui
+```
+
+This will open a web-based interface where you can easily view and edit your `config.json` file.
+
 #### Providers
 
 The `Providers` array is where you define the different model providers you want to use. Each provider object requires: