- Restore Install-Windows.bat with npm primary + ZIP fallback for OpenCode
- Restore Install-Linux.sh with npm primary + ZIP fallback for OpenCode
- Restore Install-Mac.sh with npm primary + ZIP fallback for OpenCode
- Add Launch-Windows.bat launcher with dependency checking and port detection
- Add Launch-Unix.sh launcher for Linux/macOS
- Add Launch-Dev-Windows.bat for development mode
- All scripts use actual GitHub releases URLs for OpenCode
- Enhanced with comprehensive error handling and user guidance
