add codeql to its own repo

.github/workflows/codeql.yml

@@ -0,0 +1,50 @@
+# synced from @nextcloud/android-config
+
+# SPDX-FileCopyrightText: 2022-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-FileCopyrightText: 2023-2024 Andy Scherzinger <info@andy-scherzinger.de>
+# SPDX-FileCopyrightText: 2022 Tobias Kaminsky <tobias@kaminsky.me>
+# SPDX-FileCopyrightText: 2022 Álvaro Brey <alvaro@alvarobrey.com>
+# SPDX-FileCopyrightText: 2025 Marcel Hibbe <dev@mhibbe.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "master", "main", "stable-*" ]
+  pull_request:
+    branches: [ "master", "main" ]
+  schedule:
+    - cron: '24 18 * * 3'
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'java' ]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - name: Set Swap Space
+        if: runner.environment == 'github-hosted'
+        uses: pierotofy/set-swap-space@49819abfb41bd9b44fb781159c033dba90353a7c # v1.0
+        with:
+          swap-size-gb: 10
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@ce28f5bb42b7a9f2c824e633a3f6ee835bab6858 # v3.29.0
+        with:
+          languages: ${{ matrix.language }}
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@ce28f5bb42b7a9f2c824e633a3f6ee835bab6858 # v3.29.0