Features:
- Add check for CoffeeScript compiler installation
- Add input validation for all functions
- Add proper error messages with usage information
- Add clipboard operation feedback
Improvements:
- Replace aliases with proper functions for better control
- Use local variables to prevent namespace pollution
- Add proper quoting and option handling
- Add error output redirection
- Export functions for subshell availability
The previous implementation lacked error checking and could fail silently
in various scenarios. This update makes the functions more robust and
user-friendly while maintaining the original functionality.