Add CodeQL custom workflow

Author: scordio

.github/workflows/codeql.yml

@@ -0,0 +1,48 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main", "[1-3].x" ]
+  pull_request:
+    branches: [ "main", "[1-3].x" ]
+  schedule:
+    - cron: '15 16 * * 6'
+
+permissions: {}
+
+jobs:
+
+  analyze:
+
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+        - language: actions
+          build-mode: none
+        - language: java-kotlin
+          build-mode: autobuild
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        build-mode: ${{ matrix.build-mode }}
+    - name: Set up Java
+      if: matrix.language == 'java-kotlin'
+      uses: actions/setup-java@v5
+      with:
+        distribution: 'zulu'
+        java-version: '21'
+        cache: 'maven'
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"