Resolve "Fix basedpyright warnings"

Since the project is still fairly new, I have used some "shortcuts" by using Any and pyright ignore-comments as I suspect a lot will change anyway. In other words: There is still a bit of work that needs to be done, as we (ideally) want to completely avoid using the Any type. We should therefore be careful to enforce stricter typing in future changes.

Some things to consider:

• Some libraries are missing type stubs. We could check if it is possible to add this to the project if we get a lot of issues with return types from them later.
• We should also add tests to the pipeline. I have not done this here, as I haven't looked very closely at the tests yet.

Closes #12 (closed)