Add codespell support (config, workflow to detect/not fix) and make it fix few typos

[yarikoptic]

More about codespell: https://github.com/codespell-project/codespell .

I personally introduced it to dozens if not hundreds of projects already and so far only positive feedback.

CI workflow has 'permissions' set only to 'read' so also should be safe.

TODOs

• [x] remove TEMP commit and possible github workflow if pre-commit picks up the typo somewhere inCI

[Lance-Drane]

Thank you for the contribution! I think that this will be a useful addition, particularly since it's catching several documentation and Exception spelling errors. (It's pretty funny that I made the same spelling error in both an Exception and a test checking the Exception message.) The only thing I think is necessary would be to get rid of the test commit, I'm happy to approve otherwise.

I don't mind doing this myself if you're not familiar with PDM, but I'd like to add it as a PDM development dependency under the "lint" group (pdm add --dev -G lint codespell) and make sure it's reflected in the lockfile.

[Lance-Drane]

It looks like the CI pipeline works, BTW:

https://github.com/INTERSECT-SDK/python-sdk/actions/runs/11957237005/job/33336619928?pr=19

In case it isn't visible: