add lots of type hints

[amogus07]

Description

I added type hints and refactored the modules to fix import cycles

To Do

• Documentation
• Changelog
• Tests

[sourcery-ai]

Sorry @amogus07, your pull request is larger than the review limit of 150000 diff characters

[github-actions]

Thank you for the PR! The changelog has not been updated, so here is a friendly reminder to check if you need to add an entry.

[semohr]

Hey, thanks a lot for the contribution, really appreciate the effort you’ve put into this!

This PR is quite large, which makes it a bit difficult to review thoroughly. Would you mind breaking it down into smaller, more focused commits or separate PRs? For instance, you could move file relocations or refactors into their own commits to make the changes easier to follow. You can take a look at the PR linked below for an example of how to structure these kinds of refactors.

It also looks like this PR touches on multiple areas of the codebase. To keep things maintainable and easier to review, it’s best if each PR focuses on a single concern or goal, rather than combining several changes at once.

As a side note, have you had a chance to look at #6119? It seems to address some of the same issues you’re working on here, it might be worth aligning with that effort to avoid overlap.

Thanks again for your work on this! We really appreciate your recent efforts!