v0.1.2 Added amending support, improved docs

✨ Features
- Support amending commits with -a/--amend

📚 Documentation
- Polish and clarify core concepts
- Add missing -b flag for body
- Fix module path typo in installation
- Remove ver flag, clean up prompt docs
- Add missing backticks to examples
- Mention character limits and wrapping
- Comment reuse badge
- Add collaboration section
- Improve installation instructions
- Add description, link to agentic tools
- Update agents documentation
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