Add move command feature:
- Allows moving a host from one config file to another when using includes
- Available both in the TUI interface and via CLI with 'sshm move'
- Fix history tests with proper test isolation using temp files
- Fix CMD tests with proper string contains and simplified assertions
- Add missing test utilities and helper functions
- Improve test coverage across all packages
- Remove flaky tests and replace with robust alternatives"
- Add 'move' command with interactive file selector
- Implement atomic host moving between SSH config files
- Support for configs with include directives
- Add comprehensive error handling and validation
- Update help screen with improved two-column layout
- Add internal/version module for GitHub release checking
- Integrate async version check in Bubble Tea UI
- Display update notification in main interface
- Add version check to --version/-v command output
- Include comprehensive version comparison and error handling
- Add unit tests for version parsing and comparison logic
