use native structuredClone on node, cloudflare workers, and in tests (#3166)

Currently, we only use native `structuredClone` in the browser, falling
back to `JSON.parse(JSON.stringify(...))` elsewhere, despite Node
supporting `structuredClone` [since
v17](https://developer.mozilla.org/en-US/docs/Web/API/structuredClone)
and Cloudflare Workers supporting it [since
2022](https://blog.cloudflare.com/standards-compliant-workers-api/).
This PR adjusts our shim to use the native `structuredClone` on all
platforms, if available.

Additionally, `jsdom` doesn't implement `structuredClone`, a bug [open
since 2022](https://github.com/jsdom/jsdom/issues/3363). This PR patches
`jsdom` environment in all packages/apps that use it for tests.

Also includes a driveby removal of `deepCopy`, a function that is
strictly inferior to `structuredClone`.

### Change Type

<!-- ❗ Please select a 'Scope' label ❗️ -->

- [x] `sdk` — Changes the tldraw SDK
- [x] `dotcom` — Changes the tldraw.com web app
- [ ] `docs` — Changes to the documentation, examples, or templates.
- [ ] `vs code` — Changes to the vscode plugin
- [ ] `internal` — Does not affect user-facing stuff

<!-- ❗ Please select a 'Type' label ❗️ -->

- [ ] `bugfix` — Bug fix
- [ ] `feature` — New feature
- [x] `improvement` — Improving existing features
- [x] `chore` — Updating dependencies, other boring stuff
- [ ] `galaxy brain` — Architectural changes
- [ ] `tests` — Changes to any test code
- [ ] `tools` — Changes to infrastructure, CI, internal scripts,
debugging tools, etc.
- [ ] `dunno` — I don't know


### Test Plan

1. A smoke test would be enough

- [ ] Unit Tests
- [x] End to end tests

packages/utils/api-report.md

@@ -37,9 +37,6 @@ export function debounce<T extends unknown[], U>(callback: (...args: T) => Promi
 // @public
 export function dedupe<T>(input: T[], equals?: (a: any, b: any) => boolean): T[];
 
-// @public
-export function deepCopy<T = unknown>(obj: T): T;
-
 // @internal
 export function deleteFromLocalStorage(key: string): void;
 
@@ -140,6 +137,9 @@ export function invLerp(a: number, b: number, t: number): number;
 // @public
 export function isDefined<T>(value: T): value is typeof value extends undefined ? never : T;
 
+// @internal (undocumented)
+export const isNativeStructuredClone: boolean;
+
 // @public
 export function isNonNull<T>(value: T): value is typeof value extends null ? never : T;
 
@@ -307,6 +307,9 @@ export function sortByIndex<T extends {
     index: IndexKey;
 }>(a: T, b: T): -1 | 0 | 1;
 
+// @internal
+export const STRUCTURED_CLONE_OBJECT_PROTOTYPE: any;
+
 // @public
 const structuredClone_2: <T>(i: T) => T;
 export { structuredClone_2 as structuredClone }