fix(test): add missing saveWorkspaces method to MockWorkspaceController

Author: qianmoQ

DockMasterProTests/Mocks/MockWorkspaceController.swift

@@ -48,6 +48,13 @@ final class MockWorkspaceController: WorkspaceControlling {
         }
     }
 
+    func saveWorkspaces(_ workspaces: [Workspace]) async throws {
+        if let error = stubbedError {
+            throw error
+        }
+        stubbedWorkspaces = workspaces
+    }
+    
     func deleteWorkspace(id: UUID) async throws {
         deleteWorkspaceCalled = true
         if let error = stubbedError {