Bump stylelint to 15.10.2 and remove deprecated module (#1189)

- Bump stylelint and stylelint-config-standard libs to the latest versions (security fixes)
- Remove deprecated stylelint-config-prettier module
- Scan the classic style sheet with stylelint and prettier in the github workflow
- Address stylelint and prettier issues in the classic stylesheet
- Bump prettier to 3.0.0

.github/workflows/web.yml

@@ -123,8 +123,12 @@ jobs:
       id: npm
 
     - name: Stylelint
-      run: npx stylelint src/static/themes/modern/style.css
+      run: |
+        npx stylelint src/static/themes/modern/style.css
+        npx stylelint src/static/themes/classic/style.css
 
     - name: Prettier
-      run: npx prettier --check src/static/themes/modern/style.css
+      run: |
+        npx prettier --check src/static/themes/modern/style.css
+        npx prettier --check src/static/themes/classic/style.css
       if: success() || failure() && steps.npm.outcome == 'success'

python/web/.stylelintrc.json

@@ -1,6 +1,7 @@
 {
-  "extends": ["stylelint-config-standard", "stylelint-config-prettier"],
+  "extends": ["stylelint-config-standard"],
   "rules": {
-    "no-descending-specificity": null
+    "no-descending-specificity": null,
+    "media-feature-range-notation": "prefix"
    }
-}
+}