Ci: Add typos and codespell

[georgkrause]

As reported and fixed in #28 we had some typos in our copy. This can be easily avoided by adding the documented commands to our CI pipeline.

[prateek-dagar]

Hi @georgkrause ,
I would suggest using pre-commit hooks for this instead of running them in CI. This will make it much easier to catch and fix spelling issues and typos locally before the code is even committed. Let me know if you would like me to submit a PR with this setup!