Create a workflow for checks on static files

.github/workflows/check-static-files.yml

@@ -0,0 +1,44 @@
+name: Check changes to static files
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  changed_files:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: List changed frontend source files
+        uses: tj-actions/changed-files@v44
+        id: changed-frontend-src-files
+        with:
+          files: |
+             frontend/src/**/*.tsx
+             frontend/src/**/*.css
+
+      - name: List changed frontend static files
+        id: changed-frontend-static-files
+        if: steps.changed-frontend-src-files.outputs.files_changed == 'true'
+        uses: tj-actions/changed-files@v44
+        with:
+          files: |
+            static
+
+      - name: Check changed static files
+        if: steps.changed-frontend-src-files.outputs.files_changed == 'true' && steps.changed-frontend-static-files.outputs.files_changed == 'false'
+        run: echo "There were changes to the frontend code, but no corresponding changes to static files.  Please build the project locally, commit the static file changes and push the changes to try again." && exit 1
+
+      - name: List logo customizations
+        uses: tj-actions/changed-files@v44
+        id: changed-logo-files
+        with:
+          files: |
+             frontend/public/favicon.ico
+             frontend/src/assets
+
+      - name: Check logo customizations
+        if: steps.changed-logo-files.outputs.any_changed == 'true'
+        run: echo "Logos are customized, which is not a supported change." && exit 1