Add error handling and validation to bootstrap process

[scottbrown]

Problem

The current bootstrap script lacks error handling, validation, and recovery mechanisms, making it unreliable for automated setup.

Solution

Enhance the bootstrap process with:

• Error handling for failed stow operations
• Pre-flight checks for required dependencies
• Validation of successful package installation
• Rollback capability for failed installations
• Verbose logging and status reporting

Benefits

• Reliable automated setup process
• Clear feedback on installation status
• Ability to recover from partial failures
• Better debugging capabilities

Implementation Notes

• Add dependency checks before running stow
• Implement dry-run mode for testing
• Add backup functionality before making changes
• Create detailed logging for troubleshooting
• Handle conflicts with existing files gracefully