docs: add Homebrew installation instructions to README and README_CN

- Updated both English and Chinese documentation with steps to install and start `cliproxyapi` via Homebrew.

README.md

@@ -62,6 +62,12 @@ Chinese providers have now been added: [Qwen Code](https://github.com/QwenLM/qwe
    go build -o cli-proxy-api.exe ./cmd/server
    ```
 
+### Installation via Homebrew
+
+```bash
+brew install cliproxyapi
+brew services start cliproxyapi
+```
 
 ## Usage
 

README_CN.md

@@ -76,6 +76,13 @@
    go build -o cli-proxy-api ./cmd/server
    ```
 
+### 通过 Homebrew 安装
+
+```bash
+brew install cliproxyapi
+brew services start cliproxyapi
+```
+
 ## 使用方法
 
 ### 图形客户端与官方 WebUI