Merge pull request drivercraft#20 from yueneiqi/doc

docs: add serial exit shortcut notes

Author: ZR233

README.en.md

@@ -128,6 +128,9 @@ ostool run uboot
 ostool run uboot --uboot-config my-uboot.toml
 ```
 
+> Exit shortcut: In the serial terminal (e.g., `ostool run uboot`), press `Ctrl+A` then `x` to quit; the tool captures this sequence and exits gracefully instead of sending it to the target device.
+> For more keyboard mappings, see `ostool/src/sterm/mod.rs`.
+
 ## ⚙️ Configuration Files
 
 ostool uses multiple independent TOML configuration files, each responsible for different functional modules:
@@ -529,4 +532,4 @@ This project is dual-licensed:
 
 ## 🙏 Acknowledgments
 
-Thanks to all developers and users who have contributed to the ostool project!
+Thanks to all developers and users who have contributed to the ostool project!

README.md

@@ -128,6 +128,9 @@ ostool run uboot
 ostool run uboot --uboot-config my-uboot.toml
 ```
 
+> 交互退出：在串口终端（如 `ostool run uboot`）中，按下 `Ctrl+A` 后再按 `x`，工具会检测到该序列并优雅退出，不会将按键发送到目标设备。
+> 更多键盘快捷键映射可参考源码 `ostool/src/sterm/mod.rs`。
+
 ## ⚙️ 配置文件
 
 ostool 使用多个独立的 TOML 配置文件，每个文件负责不同的功能模块：
@@ -528,4 +531,4 @@ cargo test
 
 ## 🙏 致谢
 
-感谢所有为 ostool 项目做出贡献的开发者和用户！
+感谢所有为 ostool 项目做出贡献的开发者和用户！