Run clj-kondo --lint in CI

[rads]

Please answer the following questions and leave the below in as part of your PR.

• This PR corresponds to an issue with a clear problem statement.
  • Dev: Run clj-kondo --lint in CI #100
• I have updated the CHANGELOG.md file with a description of the addressed issue.

Overview

Resolves #100.

I split the workflow into separate files so the tests can still run even if the linter is failing.

[rads]

Example failure: rads@ea8eee1

[rads]

This may require some GitHub repo changes to make these checks required.

[borkdude]

@rads I invited you to this repo as maintainer so hopefully you can configure the build yourself. I still prefer going through PRs for code changes, but for trivial things like CI tweaks or documentation PRs, etc it's ok to bypass my review.

[rads]

@borkdude: Whoa! Thanks for trusting me with this. One thing, though, is that I don't think I have enough privileges to change the CI requirements. You may need to give me more access or just do the CI part yourself. Either way works for me.

Either way I'll keep in mind your statement about the documentation PRs. I'll probably err towards the safer side and get your review for everything until I get the hang of it.

[borkdude]

I don't see how I can add status checks for linting, but I'm fine with keeping it as it is now since we'll notice that linting fails in a PR anyway, we don't have to mechanically block the PR I think.