feat: standardize CLI flag naming to kebab-case with backwards compatibility
- Rename --p2ptoken to --p2p-token for consistency
- Add deprecation alias for old --p2ptoken flag
- Fix broken name tag in config check command
- Add runtime deprecation warning system (core/cli/deprecations.go)
- Document kebab-case naming convention in code comments
- Maintain full backwards compatibility via kong aliases
Co-authored-by: localai-bot <localai-bot@noreply.github.com>
