[feature-request] Allow list of variants for route params

[xaota]

{
  path: "route/:param/:type?",
  Component,
  errorElement: <ErrorBoundary />
}

How i can describe variants for :param and :type?

I need show errorElement if param in my route not in variants array

Feature Request

{
  path: "route/:param/:type?",
  variants: {
    ":param": ["feature-a", "feature-b", "feature-c"],
    ":type": ["type-a", "type-b", "type-c"]
  },
  Component,
  errorElement: <ErrorBoundary />
}

And, if param not in variants[paramName] list -> return errorElement