[DX] sensible defaults for createTLStore (#3886)

`createTLStore` had defaults of empty arrays for shapeUtils and
bindingUtils. this is problematic since people who already are calling
`createTLStore` manually with like `createTLStore({shapeUtils:
defaultShapeUtils})` will miss out on bindings utils when they upgrade
to the latest version, and this will probably only fail at runtime for
them.

To prevent issues we could have made `shapeUtils` and `bindingUtils`
required args but it feels better to me, long term, if we bring
`createTLStore` in line with `createTLSchema` and configure it to use
tldraw's default shapes/bindings if no custom overrides are specified.

i.e. we can do this

```diff
- const store = createTLStore({ shapeUtils: defaultShapeUtils, bindingUtils: defaultBindingUtils })
+ const store = createTLStore()
```

There's still technically potential for breaking changes by people
accidentally including the arrow binding util when they might not have
arrows in the app, but I don't think that's likely to actually cause any
bugs unless they add their own arrow binding type later on.

### Change Type

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

- [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
- [x] `improvement` — Improving existing features
- [ ] `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. Add a step-by-step description of how to test your PR here.
2.

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

### Release Notes

- Add a brief release note for your PR here.

apps/docs/content/docs/persistence.mdx

@@ -130,10 +130,7 @@ The `store` property of the `<Tldraw>` / `<TldrawEditor>` components accepts a s
 export default function () {
 	const [store] = useState(() => {
 		// Create the store
-		const newStore = createTLStore({
-			shapeUtils: defaultShapeUtils,
-			bindingUtils: defaultBindingUtils,
-		})
+		const newStore = createTLStore()
 
 		// Get the snapshot
 		const stringified = localStorage.getItem('my-editor-snapshot')
@@ -165,10 +162,7 @@ export default function () {
 			if (cancelled) return
 
 			// Create the store
-			const newStore = createTLStore({
-				shapeUtils: defaultShapeUtils,
-				bindingUtils: defaultBindingUtils,
-			})
+			const newStore = createTLStore()
 
 			// Load the snapshot
 			loadSnapshot(newStore, snapshot)