workflows: Add check for manual changes to API

This adds a check to ensure that the code generated automatically by `npm run api` has no manual changes.

.github/workflows/dev-checks.yml

@@ -21,6 +21,8 @@ jobs:
         cache: 'npm'
     - name: Install dependencies
       run: npm ci
+    - name: Check for manual changes to API
+      run: npm run api && [ -z "$(git status --porcelain=v1 2>/dev/null)" ] && echo "✓ No manual API changes." || echo "✗ API manually changed, please refer to the README for the procedure to follow for programmatically generated API endpoints." && [ -z "$(git status --porcelain=v1 2>/dev/null)" ]
     - name: Run build
       run: npm run build
     - name: Run lint check