Extending `transform` only works if it is in the end of the chain

[imp-dance]

Describe the bug
When using .extend, if you transform the data, and then extend onwards afterwards, the return type will be wrong.

To Reproduce

const test = createLoader({
  useQueries: () => ({
    queries: {
      query1: useCreateQuery(async () => "foo" as const),
    }
  }),
}).extend({
  transform: (data) => data.queries.query1.data,
}).extend({
  onLoading: () => <div>Loading...</div>,
})

// Resolves to useQueries return instead of transform, which is incorrect
type Data = Types.InferLoaderData<typeof test>;

Expected behavior
createLoader.extend should always resolve to correct return types.

Actual behavior
createLoader.extend does not resolve to correct return types when using transform in a .extend-chain, but not in the end of it.