Add CodeQL workflow

Author: ffried

.github/workflows/codeql.yml

@@ -0,0 +1,22 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: "41 7 * * 2"
+
+permissions:
+  # required for all workflows
+  security-events: write
+  # required to fetch internal or private CodeQL packs
+  packages: read
+  # only required for workflows in private repositories
+  actions: read
+  contents: read
+
+jobs:
+  analyze:
+    uses: sersoft-gmbh/oss-common-actions/.github/workflows/codeql-ts-gh-action.yml@main