refactor: move e2e tests to root of repository

tests/utils/cleanup.util.ts

@@ -0,0 +1,16 @@
+import playwrightConfig from "../playwright.config";
+
+export async function cleanupBackend() {
+  const response = await fetch(
+    playwrightConfig.use!.baseURL + "/api/test/reset",
+    {
+      method: "POST",
+    }
+  );
+
+  if (!response.ok) {
+    throw new Error(
+      `Failed to reset backend: ${response.status} ${response.statusText}`
+    );
+  }
+}