feat: Add PR Linting

[seve]

Copying changes made in data portal + hosted cellxgene repos to desktop.

More info:
chanzuckerberg/single-cell-data-portal#1150

Adding the most recent contributors to this repo as revewiers.

[atolopko-czi]

LGTM, but note amannn/action-semantic-pull-request is up to v5

[codecov]

Codecov Report

Merging #2560 (fd55f0a) into main (54ab9d7) will not change coverage.
The diff coverage is n/a.

❗ Current head fd55f0a differs from pull request most recent head 7705fc7. Consider uploading reports for the commit 7705fc7 to get more accurate results

@@           Coverage Diff           @@
##             main    #2560   +/-   ##
=======================================
  Coverage   71.59%   71.59%           
=======================================
  Files          96       96           
  Lines        6650     6650           
  Branches      770      770           
=======================================
  Hits         4761     4761           
  Misses       1813     1813           
  Partials       76       76           

Flag	Coverage Δ
frontend	71.59% <ø> (ø)
javascript	71.59% <ø> (ø)
unitTest	71.59% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more