test: add automatic re-testing of all samples

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: "Sample tests"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: ["*"]
+    tags-ignore: ["*"]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+      - run: bun install
+      - run: bun test