Add CodeQL workflow

.github/workflows/codeql.yml

@@ -0,0 +1,47 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ 'dev', 'old-1.2', 'old-clickonce', 'old-master' ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ 'dev' ]
+  schedule:
+    - cron: '58 7 * * 6'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'csharp', 'javascript' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+        submodules: recursive
+    - uses: actions/setup-dotnet@v2
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Build WebUI
+      run: ./webui/build.sh
+    - name: Build CLI
+      run: dotnet build BililiveRecorder.Cli/BililiveRecorder.Cli.csproj
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
+      with:
+        category: "/language:${{matrix.language}}"