Add a job for Codespell in the CI to check spelling

[officialcjunior]

Codespell is a tool for fix spelling mistakes in the source code. This can be added in the CI
to check for spelling mistakes in the pull requests.

Please note that you might need to ignore some legitimate words while running it. A rough
sketch of the command would look something like this:
$ codespell --skip *.png --ignore-words-list Gameboy,GameBoy,te,fo,ND,ptd

Link: https://github.com/codespell-project/codespell/
Another place on the web where Codespell is used in the CI: https://github.com/yuxans/haproxy-2.2/blob/5f3eb59aff48fb559f68cbedade1204f9c0a82ed/.github/workflows/codespell.yml