How to Test Core Styles Version Change

Steps

1. See how many stylesheets are built on main branch:
   1. git checkout main
   2. npm ci
   3. npm run build --project=frontera-cms
   4. find taccsite_cms/static/site_cms/css/build -type f | wc -l
2. Clear CSS build output:
   1. rm -rf taccsite_cms/static/site_cms/css/build
   2. git restore taccsite_cms/static/site_cms/css/build/README.md — ℹ️ this file is committed
3. See how many stylesheets are built on the branch to test:
   1. git checkout the/branch-to-test
   2. npm ci
   3. npm run build --project=frontera-cms — ❗️ verify no error occurs
   4. find taccsite_cms/static/site_cms/css/build -type f | wc -l
4. Verify same number of files is output as before this PR.