Add twenty sync command (#19413)

Add one shot app synchronisation `twenty sync command` command

Complementary with `twenty app dev` command which is watch mode

Fixes
https://discord.com/channels/1130383047699738754/1489644493106839663

packages/twenty-sdk/src/cli/__tests__/integration/utils/setup-app-dev-mocks.ts

@@ -29,6 +29,9 @@ const mockApiService = {
   }),
   syncApplication: vi.fn().mockResolvedValue({ success: true, data: true }),
   uploadFile: vi.fn().mockResolvedValue({ success: true, data: true }),
+  getSchema: vi
+    .fn()
+    .mockResolvedValue({ success: true, data: 'mock-core-schema' }),
 };
 
 vi.mock('@/cli/utilities/api/api-service', () => ({
@@ -43,6 +46,7 @@ vi.mock('@/cli/utilities/api/api-service', () => ({
     createDevelopmentApplication = mockApiService.createDevelopmentApplication;
     syncApplication = mockApiService.syncApplication;
     uploadFile = mockApiService.uploadFile;
+    getSchema = mockApiService.getSchema;
   },
 }));
 
@@ -52,6 +56,12 @@ vi.mock('@/cli/utilities/file/file-uploader', () => ({
   },
 }));
 
+vi.mock('@/cli/utilities/client/client-service', () => ({
+  ClientService: class {
+    generateCoreClient = vi.fn().mockResolvedValue(undefined);
+  },
+}));
+
 vi.mock('@/cli/utilities/dev/ui/components/dev-ui', () => ({
   renderDevUI: vi.fn().mockResolvedValue({ unmount: vi.fn() }),
 }));