test: add vitest

* feature(root): add vitest and some basic tests

* fix(test): after rebase + added referrars test and more sites

* fix(test): test broken after rebase

* fix(test): provide db url to make prisma happy

* fix tests

apps/worker/vitest.config.ts

@@ -0,0 +1,3 @@
+import { getSharedVitestConfig } from '../../vitest.shared';
+
+export default getSharedVitestConfig({ __dirname });