GitHub Actions: Add CodeQL code scanning

.github/workflows/codeql.yml

@@ -0,0 +1,76 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "dev" ]
+  pull_request:
+    branches: [ "dev" ]
+  schedule:
+    - cron: '0 3 * * 1'
+  workflow_dispatch:
+
+jobs:
+  analyze:
+    name: Analyze
+    # Runner size impacts CodeQL analysis time. To learn more, please see:
+    #   - https://gh.io/recommended-hardware-resources-for-running-codeql
+    #   - https://gh.io/supported-runners-and-hardware-resources
+    #   - https://gh.io/using-larger-runners
+    # Consider using larger runners for possible analysis time improvements.
+    runs-on: 'ubuntu-latest'
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Deinit Crypto++
+      run: git submodule deinit Externals/cryptopp
+
+    - name: Install packages
+      run: |
+          sudo apt-get update -qq
+          sudo apt-get install -qq -y libsdl2-dev libglew-dev liblzo2-dev libjpeg-dev &&
+          sudo apt-get install -qq -y libopenal-dev libogg-dev libtheora-dev libvorbis-dev
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: 'c-cpp'
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+
+        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
+        # queries: security-extended,security-and-quality
+
+    - name: Run CMake
+      run: cmake -B build -DCMAKE_C_FLAGS="-w" -DCMAKE_CXX_FLAGS="-w" -DCMAKE_UNITY_BUILD=ON -DUSE_LTO=OFF
+
+    - name: Run CMake Build
+      run: cmake --build build --parallel $(nproc || echo 4)
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
+      with:
+        upload: false
+        output: sarif-results
+
+    - name: filter-sarif
+      uses: advanced-security/filter-sarif@v1
+      with:
+        patterns: |
+          -**/Externals/**
+        input: sarif-results/cpp.sarif
+        output: sarif-results/cpp.sarif
+
+    - name: Upload SARIF
+      uses: github/codeql-action/upload-sarif@v2
+      with:
+        sarif_file: sarif-results/cpp.sarif