- Implemented `update-changelog-with-llm` command that analyzes staged git diff and updates CHANGELOG.md using LLM
- Added CHANGELOG.md template for new projects
- Updated init-project script to create CHANGELOG.md from template
- Added documentation for update-changelog-with-llm in library.md
- Added update-changelog-with-llm to help table in task.template
- Enhanced CHANGELOG.md to include new command in release notes