[Bug]: SyntaxError: The requested module 'core-js' does not provide an export named 'Number'
### What happened?

The latest version (3.9.0) gives me this error 

```
<project_path>/node_modules/.pnpm/@tldraw+editor@3.9.0_react-dom@19.0.0_react@19.0.0__react@19.0.0/node_modules/@tldraw/editor/src/lib/editor/Editor.ts:86
import { Number } from 'core-js'
         ^

SyntaxError: The requested module 'core-js' does not provide an export named 'Number'
    at ModuleJob._instantiate (node:internal/modules/esm/module_job:180:21)
    at ModuleJob.run (node:internal/modules/esm/module_job:263:5)
    at onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:547:26)
    at nodeImport (<project_path>/node_modules/.pnpm/vite@5.4.11_@types+node@20.17.6_sass-embedded@1.85.1_terser@5.37.0/node_modules/vite/dist/node/chunks/dep-CB_7IfJ-.js:53056:15)
    at ssrImport (<project_path>/node_modules/.pnpm/vite@5.4.11_@types+node@20.17.6_sass-embedded@1.85.1_terser@5.37.0/node_modules/vite/dist/node/chunks/dep-CB_7IfJ-.js:52914:16)
    at eval (<project_path>/apps/main/src/routes/home.tsx:7:31)
    at instantiateModule (<project_path>/node_modules/.pnpm/vite@5.4.11_@types+node@20.17.6_sass-embedded@1.85.1_terser@5.37.0/node_modules/vite/dist/node/chunks/dep-CB_7IfJ-.js:52972:5)
```

The error only occurs when trying to render TLDraw in SSR. I am not sure if SSR is officially supported, but it did work in `3.7.2`.

It started with the addition of
`import { Number } from 'core-js';`

from this commit:
https://github.com/tldraw/tldraw/commit/54b645dd9728bc7629b4a451dc96867a39cf98f6#diff-af729319507f9150354b0c977c8133793a5ceeb736b99cad1c26aa8ba195886cR86

I don't think importing from `core-js` is needed or desired here. Removing this doesn't appear to cause any problems. I'm prepping a PR that removes and will attach it when ready.

### How can we reproduce the bug?

Easiest way I found to repro it is to create a new React Router app:
`npx create-react-router@latest my-app`

Add `tldraw`

`pnpm add tldraw`

Then replace the `routes/home.tsx` with:

```
import type { Route } from "./+types/home";
import { Tldraw } from "tldraw";
export function meta({}: Route.MetaArgs) {
  return [
    { title: "New React Router App" },
    { name: "description", content: "Welcome to React Router!" },
  ];
}

export default function Home() {
  return (
    <div style={{ position: "fixed", inset: 0 }}>
      <Tldraw />
    </div>
  );
}
```

run the app
`pnpm dev`

Try to load the app. 

### What browsers are you seeing the problem on?

_No response_

### Where did this happen?

The developer package

### Contact Details

_No response_

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