Added py.typed to export hints for mypy, fixup hints

[Quexington]

No description provided.

[Quexington]

This PR is technically good to go in terms of this repository, the problem is that since the types will be detectable now, the chia-blockchain repository is going to face a bunch of linting errors. Best hold off until there is a corresponding PR to fix those as well.

[altendky]

Unfixed errors are being ignored in Chia-Network/chia-blockchain#9371.

[mariano54]

We should merge this imo @Quexington, dealing with the issues will be a good thing

[altendky]

I had done some more hinting work, but I don't really recall the form and now it has become disconnected seemingly. #107 Maybe next week I could look back around this stuff? Maybe I'm being overly optimistic about that? :|

[Quexington]

I agree @mariano54 it just would have required a rather large PR into chia-blockchain (and certainly a larger one now). One of the biggest fixes will be that SerializedProgram and Program will actually be distinct and there's a TON of places where we pass a Program where it's expecting the latter IIRC.

[altendky]

I think we should at least have mypy running here? I'm taking a quick peek at catching up my other effort, now in #125. It might also be worth waiting until atari checkpoints to bulk edit main in blockchain in response to this.