cleanup tests structure

Author: stevensJourney

packages/web/tests/mocks/MockWebRemote.ts

@@ -11,7 +11,7 @@ import {
   SocketSyncStreamOptions
 } from '@powersync/common';
 import { serialize, type BSON } from 'bson';
-import { MockSyncService, setupMockServiceMessageHandler } from '../../src/worker/sync/MockSyncServiceWorker';
+import { MockSyncService, setupMockServiceMessageHandler } from '../utils/MockSyncServiceWorker';
 
 /**
  * Mock fetch provider that intercepts all requests and routes them to the mock sync service.

packages/web/src/worker/sync/MockSyncService.ts renamed to packages/web/tests/utils/MockSyncService.ts

@@ -4,7 +4,7 @@ import type {
   MockSyncServiceMessage,
   MockSyncServiceResponse,
   PendingRequest
-} from '../../src/worker/sync/MockSyncServiceTypes';
+} from './MockSyncServiceTypes';
 
 /**
  * Interface for mocking sync service responses in shared worker environments.