* Init package, add pytest, GitHub actions config
Some documation about the need for introspection when working on this.

* Fix reference to .venv folder in ci.yml

* Install Python via uv in ci.yml.

* Improving process documentation.

* Use system Python in CI for uv

* Try custom lockfile approach for now.

* Add missing $ syntax.

* Add missing requirements files.

* Synchronize capitalization of requirements files with GitHub actions.

* Fix typo in CI path to .requirements dir.

* Add relative path spec

* Add debug ls statement in CI

* Fix capitalization of requirements files and remove debug line.

* Remove --system in `uv pip install` commands in ci.yml

* Use --system --break-system-packages

* Update actions/checkout and pin

* Use --user instead of --system

* Set up Python version with GitHub action.