Add SonarQube CI workflow and project configs

Introduces a GitHub Actions workflow for SonarQube analysis on both backend and frontend. Adds SonarQube configuration files for backend and frontend projects to enable code quality and coverage reporting. Removes unnecessary .DS_Store files from various directories.

Author: TheSinnerAR

.DS_Store

@@ -0,0 +1,59 @@
+name: SonarQube Analysis
+on:
+  push:
+    branches:
+      - main
+      - develop
+      - 'feature/**'
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  sonarqube-backend:
+    name: SonarQube Backend Analysis
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+
+      - name: SonarQube Scan - Backend
+        uses: SonarSource/sonarqube-scan-action@v2
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN_BACKEND }}
+          SONAR_HOST_URL: https://sonarcloud.io
+        with:
+          projectBaseDir: .
+          args: >
+            -Dsonar.projectKey=omics-datascience_multiomix-backend
+            -Dsonar.organization=omics-datascience
+
+  sonarqube-frontend:
+    name: SonarQube Frontend Analysis
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '20.x'
+
+      - name: Install dependencies
+        run: npm --prefix src/frontend/static/frontend install
+
+      - name: Run linter and type checks
+        run: npm --prefix src/frontend/static/frontend run check-all
+
+      - name: SonarQube Scan - Frontend
+        uses: SonarSource/sonarqube-scan-action@v2
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN_FRONTEND }}
+          SONAR_HOST_URL: https://sonarcloud.io
+        with:
+          projectBaseDir: src/frontend/static/frontend
+          args: >
+            -Dsonar.projectKey=omics-datascience_multiomix-frontend
+            -Dsonar.organization=omics-datascience

.github/workflows/sonarqube.yaml

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+# Backend Project Configuration
+sonar.projectKey=omics-datascience_multiomix-backend
+sonar.organization=omics-datascience
+
+# This is the name and version displayed in the SonarQube UI.
+sonar.projectName=Multiomix Backend
+sonar.projectVersion=1.0
+
+# Path is relative to the sonar-project.properties file. Replace "\" by "/" on Windows.
+sonar.sources=src
+
+# Exclude frontend, tests, migrations, and other non-backend code
+sonar.exclusions=**/node_modules/**,**/frontend/static/frontend/**,**/migrations/**,**/tests/**,**/__pycache__/**,**/venv/**,**/*.pyc
+
+# Test files
+sonar.tests=src
+sonar.test.inclusions=**/tests/**,**/*_test.py,**/test_*.py
+
+# Python specific settings
+sonar.python.version=3.7,3.8,3.9,3.10,3.11
+
+# Coverage reports (if you generate them)
+# sonar.python.coverage.reportPaths=src/.coverage
+
+# Encoding of the source code. Default is default system encoding
+sonar.sourceEncoding=UTF-8

sonar-project.properties

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+# Frontend Project Configuration
+sonar.projectKey=omics-datascience_multiomix-frontend
+sonar.organization=omics-datascience
+
+# This is the name and version displayed in the SonarQube UI.
+sonar.projectName=Multiomix Frontend
+sonar.projectVersion=1.0
+
+# Path is relative to the sonar-project.properties file
+sonar.sources=src
+
+# Exclude node_modules, build output, and test files from analysis
+sonar.exclusions=**/node_modules/**,**/dist/**,**/coverage/**,**/*.test.ts,**/*.test.tsx,**/*.spec.ts,**/*.spec.tsx
+
+# Test files
+sonar.tests=src
+sonar.test.inclusions=**/*.test.ts,**/*.test.tsx,**/*.spec.ts,**/*.spec.tsx
+
+# TypeScript/JavaScript specific
+sonar.javascript.lcov.reportPaths=coverage/lcov.info
+
+# Encoding of the source code
+sonar.sourceEncoding=UTF-8