Improve codespell support: adjust and concentrate config to pyproject.toml and fix more typos

[yarikoptic]

• Concentrates codespell configuration in pyproject.toml instead of pre-commit configuration so user could simply run codespell and get it all clean
• Do codespell .json files (but not package-lock.json)
• Two typos fixed
• Highly related: add typos spell checker to pre-commit #2568 . Apparently more typos to add to codespell ;-)

TODOs:

• Check if CI workflow is actually needed -- may be pre-commit would pick up typo in that TEMP commit. pre-commit fixes it, so no CI to just detect typos is needed per se (well, pre-commit runs on changed only files AFAIK, with upgrade of codespell in pre-commit might require a run on all files... probably nothing new in procedures)

[yarikoptic]

No CI workflow detected a typo, that's odd... I will try once again with slightly adjusted/extended configuration/fixes of typos.

edit: dang -- of cause, it is pre-commit autofixing it, dang... ok, removing custom CI and TEMP commit

[yarikoptic]

resolved conflict (now there is tool.typos config as well). FWIW: as long as codespell is used in pre-commit (and why not typos there?) -- IMHO worth having configuration for it and thus considering this PR.

[Adam-D-Lewis]

LGTM, thanks @yarikoptic