ci: configure codeql locally within the repo to allow for customization

Moving to the configuration being in the repo allows us to specify which specific rules are run in analysis.

Author: josephperrott

.github/workflows/codeql.yml

@@ -0,0 +1,35 @@
+name: 'CodeQL'
+
+on:
+  push:
+    branches: ['main', '*.*.x']
+  schedule:
+    - cron: '39 9 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: 'ubuntu-latest'
+    permissions:
+      security-events: write
+      packages: read
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: javascript-typescript
+            build-mode: none
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@1a7989f3955e0c69f0e0ccc14aee54a387a0fd31 #v3.28.8
+        with:
+          languages: javascript-typescript
+          build-mode: none
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@86b04fb0e47484f7282357688f21d5d0e32175fe #v3.28.8
+        with:
+          category: '/language:javascript-typescript'