Add a Codespell action

[peternewman]

Although looking at your other actions, maybe you'd prefer pre-commit which we also support?

To make this clean either fo or ideally that specific line instance needs ignoring too.

[casperdcl]

• Would prefer a pre-commit version.
• How does the pre-commit version work? Does it require an internet connection or is the dictionary/logic on the local machine?

[pmhahn]

Would prefer a pre-commit version.

pre-commit hook integration also available: https://github.com/codespell-project/codespell

How does the pre-commit version work? Does it require an internet connection or is the dictionary/logic on the local machine?

codespell has its own internal dictionary and works offline — once you have it installed locally.

[pmhahn]

Already fixed by 97449e3