fix: Adjust typehinting for project packaging

[AstreaTSS]

What type of pull request is this?

• Non-breaking code change
• Breaking code change
• Documentation change/addition
• Tests change

Description

#174 was wrongly thought to make sure .pyi files were being included when installing Dis-Snek from PIP. To an extent, it did, as using pip install . in the Dis-Snek project itself would work but installing it from a wheel or using PyPI would not include these files.

This PR fixes that, making sure those files are included while building the package.

EDIT: as per request, py.typed has also been fixed.

Changes

• Remove package_data from setup.py and use include_package_data instead.
  • Globbing was not the way and it seems like setup.py ignored it.
• Create MANIFEST.in for include_package_data and make it include .pyi files (and some other basic files).
• EDIT: Move py.typed to the correct spot and add it to MANIFEST.in.

Checklist

• I've formatted my code with Black
• I've ensured my code works on Python 3.10.x
• I've tested my code

Additional Note

EDIT: The below note has been adjusted for in this PR now, as per request.

While doing this PR, I found out we technically don't have a py.typed, which is why it's not included in MANIFEST.in. That probably needs to be added in a separate PR, though I can add it here if needed.

[silasary]

We do have a py.typed, it's just not in the right place :/
https://github.com/Discord-Snake-Pit/Dis-Snek/blob/master/py.typed

[LordOfPolls]

re @silasary and additional note

imo that should probs be included in this pr

[AstreaTSS]

re @silasary and additional note

imo that should probs be included in this pr

And included! The PR name (and description) has also been adjusted so that it makes sense.