add github workflow to test

.github/workflows/test.yml

@@ -0,0 +1,43 @@
+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+jobs:
+  test:
+    name: Regression tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Install just
+        uses: extractions/setup-just@v3
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Install Node
+        uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: pnpm
+
+      - name: Install Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: 1.3.14
+
+      - name: Install dependencies
+        run: just install
+
+      - name: Test
+        run: just test