chore: migrate to vitest for 10x faster tests (#257)

* chore migrate to vitest

* chore: cleanup jest stuff

* chore: install the coverage dep

vitest.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vite';
+import path from 'path';
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, './'),
+    },
+  },
+});