DM-35347: Add yamllint, user get_lsst_versions

[mwittgen]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Merging #28 (1fcd6fd) into main (1a01190) will not change coverage.
The diff coverage is n/a.

❗ Current head 1fcd6fd differs from pull request most recent head f66101a. Consider uploading reports for the commit f66101a to get more accurate results

@@           Coverage Diff           @@
##             main      #28   +/-   ##
=======================================
  Coverage   86.21%   86.21%           
=======================================
  Files          22       22           
  Lines        2727     2727           
  Branches      542      542           
=======================================
  Hits         2351     2351           
  Misses        297      297           
  Partials       79       79           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1a01190...f66101a. Read the comment docs.

[mwittgen]

yamllint crates warnings github workflows. Quoting the on keyword silences them.
adrienverge/yamllint#430

[timj]

Looks fine. If you use the yamllint.yaml from daf_butler many of these changes would not be needed.

[timj]

Maybe we should put a >=1.3.0 constraint on the lsst-versions dependency.