`add nrepl`: add cider-nrepl and refactor-nrepl

[teodorlu]

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

• [x] This PR corresponds to an issue with a clear problem statement.

  • https://github.com/babashka/neil/issues/199

• [ ] I have updated the CHANGELOG.md file with a description of the addressed issue.

• [x] I have considered whether I should add more tests covering the code I've changed.

  • Existing test has been updated to assert new :main-opts and new :extra-deps.