fix: Aliased exports to already exported component for "use client"

[justinvdm]

For the worker environment, when transforming "use client" modules that export a component with both its original name and an aliased name:

"use client"

export const Slot = () => {
  return jsx('div', { children: 'Slot' });
}

export { Slot, Slot as Root }

... the result looked like this - note the const that appears twice:

import { registerClientReference } from "rwsdk/worker";

const Slot = registerClientReference("/test/file.tsx", "Slot");
const Slot = registerClientReference("/test/file.tsx", "Root");  // same const as line above!

export { Slot, Slot as Root };

This PR fix this so that we correctly qualify the names for the alias case:

import { registerClientReference } from "rwsdk/worker";

const Slot = registerClientReference("/test/file.tsx", "Slot");
const Slot_Root = registerClientReference("/test/file.tsx", "Root");

export { Slot, Slot_Root as Root };