chore: add Vitest scaffolding and sync package.json to v2.2.3

vitest.config.ts

@@ -0,0 +1,9 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    include: ["tests-ts/**/*.test.ts"],
+    environment: "node",
+    reporters: ["verbose"],
+  },
+});