Move codespell config to pyproject.toml only

[Adam-D-Lewis]

Reference Issues or PRs

The codespell config was added to pyproject.toml in #2583. This allows users to run codespell from command line and pick up the config as well as be picked up by pre-commit. Typos config is already in pyproject as well since some options couldn't be set via command line.
I think we should move the codespell config there exclusively so we don't have to update things in 2 places. The only difference is we still want --write on pre-commit, but not when using codespell from command line.

What does this implement/fix?

Put a x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe): cicid

Testing

• Did you test the pull request locally?
• Did you add new tests?

Any other comments?

[marcelovilla]

LGTM!