chore: Add test workflow.

.github/workflows/test.yml

@@ -0,0 +1,32 @@
+name: test
+
+# Controls when the action will run.
+#   Triggers the workflow on all pushes, except on tag creation.
+on:
+  push:
+    branches:
+    - '**'
+    tags-ignore:
+    - '**'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout 🛎️
+      uses: actions/checkout@v4
+
+    - name: Setup 🔧
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+        cache: yarn
+
+    - name: Install 📦
+      run: yarn install
+
+    - name: Test ✅
+      run: yarn coverage
+
+    - name: Build ⚙️
+      run: yarn build