- Add install.sh for Trae IDE integration
- Add uninstall.sh with manifest-based safe removal
- Add README.md (English)
- Add README.zh-CN.md (Chinese)
- Support local and global installation
- Support TRAE_ENV=cn for CN environment
- Non-destructive installation (won't overwrite existing files)
- Manifest-based uninstallation (preserves user files)
Change-Id: I9870874e272fffd9e1966d9bc40d20142314b969