* chore: add pre-commit config, type hints, badges, and lint codebase
- Add .pre-commit-config.yaml and pyproject.toml for Black and isort
- Add missing type hints throughout the code (Dict[...] for Python 3.8 compatibility)
- Added badges and convert existing badges to use <a><img></a> format
- Lint Markdown files
- Lint Jinja templates with djlint
* Resolve error and fix remaining type hint violations
* Fix absolute imports and mock paths in test_clone.py to resolve test failures.
* Replace deprecated 'dotenv' with 'python-dotenv' in requirements.txt to resolve installation errors.
