Add Qodana GitHub workflow

Added a new GitHub Actions workflow for running Qodana, a JetBrains code quality tool, on every push and pull request to the main branch. This workflow runs Qodana Scan on an ubuntu-latest runner and uses QODANA_TOKEN for authentication. It is necessary to maintain the code quality and ensure standards are met before merging into main branch.

.github/workflows/qodana.yml

@@ -0,0 +1,24 @@
+name: Qodana
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  qodana:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      checks: write
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}  # to check out the actual pull request commit, not the merge commit
+          fetch-depth: 0  # a full history is required for pull request analysis
+      - name: 'Qodana Scan'
+        uses: JetBrains/qodana-action@v2023.2
+        env:
+          QODANA_TOKEN: ${{ secrets.QODANA_TOKEN }}