React Router/7/Add V7 RelativeSplatPath Flag

This transformation adds the necessary configuration to enable v7 features, specifically the v7_relativeSplatPath flag. It affects both components and createBrowserRouter configurations.

Before

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

After

<BrowserRouter
  future={{
    v7_relativeSplatPath: true,
  }}
>
  {/* Routes */}
</BrowserRouter>

Before

const router = createBrowserRouter(routes);

After

const router = createBrowserRouter(routes, {
  future: {
    v7_relativeSplatPath: true,
  },
});

This change adds the future option with the v7_relativeSplatPath flag set to true. This enables the new behavior for relative path matching and linking for multi-segment splat paths in React Router v7.