Add self-update functionality

Implement a self-update feature for TroubleKuber:

Features to implement

• Add command to check for new versions
• Implement automatic update from Git repository
• Add version comparison logic
• Create backup of current version before updating
• Add rollback capability for failed updates
• Implement update notifications

Implementation details

• Create lib/utils/updater.sh module
• Add version checking against Git repository
• Implement safe update procedure with backups
• Add configuration options for update behavior
• Create update history tracking
• Add changelog display for new versions

User experience

• Allow users to check for updates with
  TroubleKuber v0.1.0

Usage: troublekuber [OPTIONS] Options: -d | --dry-run - Enable dry-run mode. Doesn't write to file. -h | --help - Print this help menu -i | --interactive - Use interactive mode -s | --skip-dependency-check - Skip dependency checks -v | --version - Displays the current version -x | --debug
- Enable debug mode

• Provide update command:
  TroubleKuber v0.1.0

Usage: troublekuber [OPTIONS] Options: -d | --dry-run - Enable dry-run mode. Doesn't write to file. -h | --help - Print this help menu -i | --interactive - Use interactive mode -s | --skip-dependency-check - Skip dependency checks -v | --version - Displays the current version -x | --debug
- Enable debug mode

• Show release notes during updates
• Allow skipping versions or only getting stable releases