test(tooling): add vitest baseline policy and order tests

vitest.config.ts

@@ -0,0 +1,17 @@
+import { dirname, resolve } from "node:path"
+import { fileURLToPath } from "node:url"
+import { defineConfig } from "vitest/config"
+
+const rootDir = dirname(fileURLToPath(import.meta.url))
+
+export default defineConfig({
+  test: {
+    environment: "node",
+    include: ["tests/**/*.test.ts"],
+  },
+  resolve: {
+    alias: {
+      "@": resolve(rootDir, "."),
+    },
+  },
+})