feat(project): add support for stylelint for linting CSS files (#4801)

Co-authored-by: Josh Black <[email protected]>

Author: joshblack

.github/workflows/ci.yml

@@ -48,6 +48,8 @@ jobs:
         run: npm ci
       - name: Lint JavaScript
         run: npm run lint
+      - name: Lint CSS
+        run: npm run lint:css
       - name: Lint markdown
         run: npm run lint:md
 

.stylelintignore

@@ -0,0 +1,5 @@
+docs/public/**/*.css
+lib-esm/**/*.css
+lib/**/*.css
+dist/**/*.css
+.next/**/*.css