Add CodeQL analysis workflow for repository

Author: r0073rr0r

.github/workflows/codeql.yml

@@ -0,0 +1,49 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: '0 3 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'java-kotlin' ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+
+      # Install Flutter
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: 'stable'
+
+      - name: Install dependencies
+        run: flutter pub get
+
+      # Manual build (ovo rešava CodeQL problem)
+      - name: Build Android
+        run: flutter build apk --debug
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3