Implement the wrap function with the asyncio.to_thread underneath.

[stankudrow]

Features:

• base::wrap -> base::asyncio.to_thread
• update Justfile
• update pytest configuration in the pyproject.toml file
• add mypy for just check

Closes #207 .
Makes the #177 obsolete (actually done by the #209).

[stankudrow]

@Tinche , hello.

Converted to draft so the PR #216 can be resolved first.

[stankudrow]

@Tinche , hello.

Could you possibly have a look at this PR?

[Tinche]

I don't see a ton of value in the wrap -> to_coro refactor so I'm going to pass on it, sorry.

[stankudrow]

I don't see a ton of value in the wrap -> to_coro refactor so I'm going to pass on it, sorry.

No problem, but please have another look at this PR:

• the wrap function is back, but with asyncio.to_thread
• Justfile updated
• the code is groomed a little bit
• .python-version...it didn't make because uv sticks to the Python version from the ".python-version" file -> https://github.com/Tinche/aiofiles/actions/runs/16857818297/job/47753607482#step:5:42

I hope these changes are enough and still add real value to the project.

[stankudrow]

@Tinche , hello.

This PR is ready for another review:

• RUF specific-rules added -> RUF022 sorted the __all__ variable in some modules;
• mypy is used in the just check rule -> good to go before Add type stubs from typeshed #222 ;
• no changes in CI/CD - not for this PR (opinion)

[stankudrow]

@Tinche , good day.

I have updated the CHANGELOG and README files, the tox -e (py39|py314|check) commands are OK locally, so this PR is finalised enough. If you are OK with the changes as they are, let 'em be merged, please.

[stankudrow]

@Tinche , hello.

Are you ready to merge this PR so the next #222 and #193 could be rebased and proceeded?