[click-shell] Add stubs for click-shell

[teis-j]

This adds stubs for version 2.1 of the click-shell package: https://github.com/clarkperkins/click-shell

[donBarbos]

Thank you for contributing! This package seems to be no longer supported by maintainer (last commit 4 years ago), so accepting this stubs into typeshed seems relevant.
Just a few things to correct:

[donBarbos]

Thank you, just few nits. And let's close the previous suggestion discussions to make it look more compact

[donBarbos]

Thanks, this looks much better. We just need to wait for one of the maintainers. I’ll just note that many of the Any types were simply taken from сlick type hints.
And it might be a good idea to merge main branch so that all tests can pass.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

discord.py (https://github.com/Rapptz/discord.py)
- discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
+ discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
- discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
+ discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]

[srittau]

Thanks!