ci: Add CodeQL

Signed-off-by: Michael Vetter <jubalh@iodoru.org>

.github/workflows/codeql.yml

@@ -0,0 +1,64 @@
+name: "CodeQL"
+
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: 'c-cpp'
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            libcmocka-dev libcurl4-openssl-dev libgcrypt20-dev libglib2.0-dev \
+            libgpgme-dev libgtk-3-dev libmicrohttpd-dev libncursesw5-dev \
+            libnotify-dev libotr5-dev libreadline-dev libsignal-protocol-c-dev \
+            libomemo-c-dev libssl-dev libtool libxss-dev meson ninja-build \
+            pkg-config python3-dev python-dev-is-python3 libsqlite3-dev \
+            libgdk-pixbuf-2.0-dev libqrencode-dev libenchant-2-dev \
+            autoconf autoconf-archive automake cmake expect
+
+      - name: Install stabber and libstrophe
+        run: |
+          git clone --depth 1 https://github.com/profanity-im/stabber /tmp/stabber
+          cd /tmp/stabber && ./bootstrap.sh && ./configure --prefix=/usr && make -j$(nproc) && sudo make install
+          
+          git clone --depth 1 https://github.com/strophe/libstrophe /tmp/libstrophe
+          cd /tmp/libstrophe && ./bootstrap.sh && ./configure --prefix=/usr && make -j$(nproc) && sudo make install
+
+      - name: Build for Analysis
+        run: |
+          meson setup build_codeql \
+            -Dnotifications=enabled \
+            -Dpython-plugins=enabled \
+            -Dc-plugins=enabled \
+            -Dotr=enabled \
+            -Dpgp=enabled \
+            -Domemo=enabled \
+            -Domemo-qrcode=enabled \
+            -Dicons-and-clipboard=enabled \
+            -Dgdk-pixbuf=enabled \
+            -Dxscreensaver=enabled \
+            -Dspellcheck=enabled \
+            -Dtests=false
+          meson compile -C build_codeql
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:c-cpp"