feat(main.ts): Add commit style analysis and storage

- Implement function to analyze commit history and extract a minimal style guide
- Store the learned commit style for the repository or per author
- Load previously learned styles and use them as the default
- Add support for different commit formats (Conventional, Semantic, Angular, Kernel)
- Allow resetting the default format

BREAKING CHANGE: Removed the `build.ts` file and related functionality

Author: sidedwards