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:

README_zh.md

@@ -162,6 +162,16 @@ ccr code
 > ccr restart
 > ```
 
+### 4. UI 模式
+
+为了获得更直观的体验，您可以使用 UI 模式来管理您的配置：
+
+```shell
+ccr ui
+```
+
+这将打开一个基于 Web 的界面，您可以在其中轻松查看和编辑您的 `config.json` 文件。
+
 #### Providers
 
 `Providers` 数组是您定义要使用的不同模型提供商的地方。每个提供商对象都需要：