ci: add test workflow

.github/workflows/test.yml

@@ -0,0 +1,25 @@
+name: Test
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Bun
+        uses: oven-sh/setup-bun@v2
+
+      - name: Install dependencies
+        run: bun i --frozen-lockfile
+
+      - name: Copy dev variables
+        run: cp .dev.vars.example .dev.vars
+
+      - name: Run tests
+        run: bun vitest run