Add: workflow and script for checking ini_key issues in WindowDesc entries

.github/workflows/windowdesc-ini-key.yml

@@ -0,0 +1,24 @@
+name: WindowDesc ini_key
+
+on:
+  pull_request:
+    branches:
+    - master
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
+jobs:
+  windowdesc-ini-key:
+    name: WindowDesc ini_key issues
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Check for ini_key issues in WindowDesc entries
+      shell: bash
+      run: |
+        python3 .github/windowdesc-ini-key.py