Add 'codeql.yml' with manual build

Signed-off-by: Joel Van Eenwyk <[email protected]>

.github/workflows/codeql.yml

@@ -0,0 +1,62 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+  schedule:
+    - cron: '40 19 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+
+    runs-on: windows-latest
+    timeout-minutes: 120
+    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
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+        - language: csharp
+          build-mode: manual
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        build-mode: ${{ matrix.build-mode }}
+
+    - name: Setup .NET
+      uses: actions/[email protected]
+      with:
+        dotnet-version: 8.0.x
+
+    - if: matrix.build-mode == 'manual'
+      name: Restore ${{env.SLN}}
+      run: dotnet restore ${{env.SLN}}
+
+    - if: matrix.build-mode == 'manual'
+      name: Build ${{env.SLN}} ${{env.SLN_CONFIG}}
+      run: dotnet build ${{env.SLN}} --configuration ${{env.SLN_CONFIG}} --no-restore -p:GITHUB_ACTIONS=true
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"