codeql workflow added

.github/workflows/codeql.yml

@@ -0,0 +1,54 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: '43 3 * * 6'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
+    timeout-minutes: ${{ (matrix.language == 'swift' && 120) || 360 }}
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'dart' ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+
+      # Additional step for Dart analysis
+      - name: Install Dart SDK
+        uses: dart-lang/setup-dart@v1
+
+      # Add any pre-build steps specific to your Flutter project if necessary
+      # For example, running `flutter pub get` to get dependencies
+      - name: Flutter pub get
+        run: flutter pub get
+
+      # Add your Flutter/Dart build step if needed
+      # - name: Flutter build
+      #   run: flutter build apk --release
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "Dart analysis"