react-router/7/add_v7_startTransition_Flag

This transformation adds the necessary configuration to enable v7 features, specifically the v7_startTransition flags. It affects <BrowserRouter>, <RouterProvider>, and createBrowserRouter configurations.

Before

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<BrowserRouter>
  {/* Routes */}
</BrowserRouter>

After

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<BrowserRouter
  future={{
    v7_startTransition: true,
  }}
>
  {/* Routes */}
</BrowserRouter>

Before

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<RouterProvider router={router} />;

After

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<RouterProvider
  future={{
    v7_startTransition: true,
  }}
  router={router}
/>;