feat: add CI workflow for accessibility and syntax validation

.gitea/workflows/a11y.yml

@@ -0,0 +1,27 @@
+name: Accessibility Checks
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  a11y-audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Validate ARIA Attributes in game.js
+        run: |
+          echo "Checking game.js for ARIA attributes..."
+          grep -q "aria-label" game.js || (echo "ERROR: aria-label missing from game.js" && exit 1)
+          grep -q "aria-valuenow" game.js || (echo "ERROR: aria-valuenow missing from game.js" && exit 1)
+          grep -q "aria-pressed" game.js || (echo "ERROR: aria-pressed missing from game.js" && exit 1)
+          
+      - name: Validate ARIA Roles in index.html
+        run: |
+          echo "Checking index.html for ARIA roles..."
+          grep -q "role=" index.html || (echo "ERROR: No ARIA roles found in index.html" && exit 1)
+          
+      - name: Syntax Check JS
+        run: |
+          node -c game.js