ci: add SonarQube GitHub Actions workflow

- Add automated SonarQube analysis on push to main
- Add quality gate check for pull requests
- Configure Node.js 20 environment for analysis

Author: Addy-shetty

.github/workflows/sonarqube.yml

@@ -0,0 +1,41 @@
+name: SonarQube Analysis
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  sonarqube:
+    name: SonarQube Scan
+    runs-on: ubuntu-latest
+    
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for better analysis
+      
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: SonarQube Scan
+        uses: SonarSource/sonarqube-scan-action@master
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+      
+      - name: SonarQube Quality Gate check
+        id: sonarqube-quality-gate-check
+        uses: sonarsource/sonarqube-quality-gate-action@master
+        timeout-minutes: 5
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}