add codeql workflow

src/Umbraco.Web.UI.Client/.github/workflows/codeql-analysis.yml

@@ -0,0 +1,38 @@
+name: 'CodeQL'
+
+on:
+  push:
+    branches: [dev, main]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [dev]
+  schedule:
+    - cron: '39 20 * * 3'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ['typescript']
+        # Learn more about CodeQL language support at https://git.io/codeql-language-support
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2