* feat: support multiprocessing
* test: update tests to reflect the logging changes
* feat: allow autodetection of CPU counts
* test: don't use rich handler if want to parse log output
* test: measure coverage from subprocesses
* test: fix coverage issues due to monkeypatch.chdir()
* perf: use ProcessPoolExecutor for async logging

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Co-authored-by: Brendan <2bndy5@gmail.com>

also updated pre-commit hooks and ran them

Co-authored-by: Brendan <2bndy5@gmail.com>

This better satisfies the maximum comment length imposed by GitHub while leaving the step summary length unhindered.

An added benefit here is that we only create a comment when it is needed. Previously, we were creating a comment to also get a tally of checks failed.

Other changes:
* make_annotations() before other feedback that requires permissions
* output step-summary before other feedback that requires permissions
* set outputs before other feedback that requires permission
* add specific test about comment length

Uses RST substitution to put README badges in 1 line.

ref #97

- fix typo in permissions.rst code snippets
- declare minimum version for new `--jobs `arg
- resolve undefined reference to `HTTPError`