Restructure the repo

[srivarra]

The current repo structure is half baked at best.

As we add features, a set organization will be prove to be useful over the long term.

The scverse cookiecutter comes with a lot of nice functionality built in. Check out the default example repo it generates:

• automated testing with pytest
• continuous integration using GitHub actions.
• documentation hosted by readthedocs
• coverage tests with codecov
• pre-commit checks for code style and consistency
• tutorials with myst-nb and jupyter notebooks
• bump2version for managing releases

This will help to ensure better code quality. In addition we should add developer documentation with recommended learning material.