assets: mark assetOptions as internal (#4014)

internal for now until we figure out this PR:
https://github.com/tldraw/tldraw/pull/3992

### Change Type

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- [x] `sdk` — Changes the tldraw SDK
- [ ] `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
- [ ] `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

packages/editor/api-report.md

@@ -2520,6 +2520,7 @@ export const TldrawEditor: React_2.NamedExoticComponent<TldrawEditorProps>;
 
 // @public
 export interface TldrawEditorBaseProps {
+    // @internal
     assetOptions?: Partial<TLAssetOptions>;
     autoFocus?: boolean;
     bindingUtils?: readonly TLAnyBindingUtilConstructor[];

packages/editor/src/lib/TldrawEditor.tsx

@@ -162,6 +162,7 @@ export interface TldrawEditorBaseProps {
 
 	/**
 	 * Asset options for the editor.
+	 * @internal
 	 */
 	assetOptions?: Partial<TLAssetOptions>