Add CodeQL workflow

.github/workflows/codeql.yml

@@ -0,0 +1,66 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ 'master', '0.3', '0.4', '0.5', '1.0', '1.1', '1.2', '1.3', '2.0', '2.1', '2.2', '3.0', '3.1', '3.2', '3.3', '3.4', '3.5', '3.6' ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ 'master' ]
+  schedule:
+    - cron: '5 7 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        cconfig: [shared, static]
+        s: [ubuntu-latest]
+
+    steps:
+
+    - name: Cache Qt
+      id: cache-qt
+      uses: actions/cache@v1
+      with:
+        path: ../Qt
+        key: ${{runner.os}}-QtCache
+
+    - name: Install Qt
+      uses: jurplel/install-qt-action@v2
+      with:
+        cached: ${{steps.cache-qt.outputs.cache-hit}}
+
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # 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.
+
+        # 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-and-quality
+
+    - name: Build
+      run: |
+        qmake -v
+        ./configure -verbose -config ${{matrix.cconfig}}
+        make -j2
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
+      with:
+        category: "/language:${{matrix.language}}"