Add test workflow

.github/workflows/test.yml

@@ -0,0 +1,32 @@
+name: test
+on:
+    push:
+        branches:
+            - main
+    pull_request:
+        branches:
+            - main
+jobs:
+    test:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v3
+            - uses: pnpm/action-setup@v2 # Install pnpm using packageManager key in package.json
+
+            - name: Use Node.js 18
+              uses: actions/setup-node@v3
+              with:
+                  node-version: 18
+                  cache: "pnpm"
+
+            - name: Install dependencies
+              run: pnpm install --frozen-lockfile
+
+            - name: Run tests
+              run: pnpm test
+
+            - name: Test if it compiles
+              run: |
+                  pnpm build
+                  pnpm build --dev