refactor: remove unused and legacy code

- remove legacy migrations
- remove unused server code
- remove unused UI code

apps/client/src/declarations/test.d.ts

@@ -1,11 +0,0 @@
-import { TestingLibraryMatchers } from '@testing-library/jest-dom/matchers';
-
-import 'vitest';
-
-// ugly hack because vite and pnpm are not playing ball with jest
-// https://github.com/testing-library/jest-dom/issues/123
-declare global {
-  namespace Vi {
-    type Assertion<T = any> = TestingLibraryMatchers<T, void>;
-  }
-}