chore: update CI workflow to include Node.js version matrix and SSR check

Author: Simon-He95

.github/workflows/ci.yml

@@ -1,5 +1,48 @@
 name: CI
 
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Typecheck & Tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [18, 20]
+    env:
+      CI: true
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
+          cache: 'pnpm'
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 10.18.1
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Typecheck
+        run: pnpm run typecheck
+
+      - name: Run tests
+        run: pnpm test -- --run
+
+      - name: Run SSR check
+        run: pnpm run check:ssr
+name: CI
+
 on:
   push:
     branches: [main]