Revert "chore: remove obsolete test workflow file"

This reverts commit de90b2c.

Author: Fabrimat

.github/workflows/test.workflow.yml

@@ -0,0 +1,28 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+  do-tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run tests
+        run: npm run test