feat: add Jest testing framework and CI/CD configuration (#187)

Co-authored-by: samanhappy@qq.com <my6051199>

.github/workflows/ci.yml

@@ -0,0 +1,112 @@
+name: CI/CD Pipeline
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main, develop]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Enable Corepack
+        run: corepack enable
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Run linter
+        run: pnpm lint
+
+      - name: Run type checking
+        run: pnpm backend:build
+
+      - name: Run tests
+        run: pnpm test:ci
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          file: ./coverage/lcov.info
+          flags: unittests
+          name: codecov-umbrella
+
+  # build:
+  #   runs-on: ubuntu-latest
+  #   needs: test
+
+  #   steps:
+  #     - name: Checkout code
+  #       uses: actions/checkout@v4
+
+  #     - name: Setup Node.js
+  #       uses: actions/setup-node@v4
+  #       with:
+  #         node-version: '20.x'
+
+  #     - name: Enable Corepack
+  #       run: corepack enable
+
+  #     - name: Install dependencies
+  #       run: pnpm install --frozen-lockfile
+
+  #     - name: Build application
+  #       run: pnpm build
+
+  #     - name: Verify build artifacts
+  #       run: node scripts/verify-dist.js
+
+  # integration-test:
+  #   runs-on: ubuntu-latest
+  #   needs: test
+
+  #   services:
+  #     postgres:
+  #       image: postgres:15
+  #       env:
+  #         POSTGRES_PASSWORD: postgres
+  #         POSTGRES_DB: mcphub_test
+  #       options: >-
+  #         --health-cmd pg_isready
+  #         --health-interval 10s
+  #         --health-timeout 5s
+  #         --health-retries 5
+
+  #   steps:
+  #     - name: Checkout code
+  #       uses: actions/checkout@v4
+
+  #     - name: Setup Node.js
+  #       uses: actions/setup-node@v4
+  #       with:
+  #         node-version: '20.x'
+
+  #     - name: Enable Corepack
+  #       run: corepack enable
+
+  #     - name: Install dependencies
+  #       run: pnpm install --frozen-lockfile
+
+  #     - name: Build application
+  #       run: pnpm build
+
+  #     - name: Run integration tests
+  #       run: |
+  #         export DATABASE_URL="postgresql://postgres:postgres@localhost:5432/mcphub_test"
+  #         node test-integration.ts
+  #       env:
+  #         NODE_ENV: test