[Proposal] Improve internal typing #95
Description
Motivation
Currently the codebase is entirely void of type annotations. This makes it impossible to use static type checking, and makes it harder to implement proper testing and CI/CD.
Description
The codebase (especially the helper modules) should be updated with proper (sensible) type annotations. This would enable to use tools like mypy to run type checking, and also improve readability (mainly due to function signatures).