tldraw zero - package shuffle (#1710)

This PR moves code between our packages so that:
- @tldraw/editor is a “core” library with the engine and canvas but no
shapes, tools, or other things
- @tldraw/tldraw contains everything particular to the experience we’ve
built for tldraw

At first look, this might seem like a step away from customization and
configuration, however I believe it greatly increases the configuration
potential of the @tldraw/editor while also providing a more accurate
reflection of what configuration options actually exist for
@tldraw/tldraw.

## Library changes

@tldraw/editor re-exports its dependencies and @tldraw/tldraw re-exports
@tldraw/editor.

- users of @tldraw/editor WITHOUT @tldraw/tldraw should almost always
only import things from @tldraw/editor.
- users of @tldraw/tldraw should almost always only import things from
@tldraw/tldraw.

- @tldraw/polyfills is merged into @tldraw/editor
- @tldraw/indices is merged into @tldraw/editor
- @tldraw/primitives is merged mostly into @tldraw/editor, partially
into @tldraw/tldraw
- @tldraw/file-format is merged into @tldraw/tldraw
- @tldraw/ui is merged into @tldraw/tldraw

Many (many) utils and other code is moved from the editor to tldraw. For
example, embeds now are entirely an feature of @tldraw/tldraw. The only
big chunk of code left in core is related to arrow handling.

## API Changes

The editor can now be used without tldraw's assets. We load them in
@tldraw/tldraw instead, so feel free to use whatever fonts or images or
whatever that you like with the editor.

All tools and shapes (except for the `Group` shape) are moved to
@tldraw/tldraw. This includes the `select` tool.

You should use the editor with at least one tool, however, so you now
also need to send in an `initialState` prop to the Editor /
<TldrawEditor> component indicating which state the editor should begin
in.

The `components` prop now also accepts `SelectionForeground`.

The complex selection component that we use for tldraw is moved to
@tldraw/tldraw. The default component is quite basic but can easily be
replaced via the `components` prop. We pass down our tldraw-flavored
SelectionFg via `components`.

Likewise with the `Scribble` component: the `DefaultScribble` no longer
uses our freehand tech and is a simple path instead. We pass down the
tldraw-flavored scribble via `components`.

The `ExternalContentManager` (`Editor.externalContentManager`) is
removed and replaced with a mapping of types to handlers.

- Register new content handlers with
`Editor.registerExternalContentHandler`.
- Register new asset creation handlers (for files and URLs) with
`Editor.registerExternalAssetHandler`

### Change Type

- [x] `major` — Breaking change

### Test Plan

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

### Release Notes

- [@tldraw/editor] lots, wip
- [@tldraw/ui] gone, merged to tldraw/tldraw
- [@tldraw/polyfills] gone, merged to tldraw/editor
- [@tldraw/primitives] gone, merged to tldraw/editor / tldraw/tldraw
- [@tldraw/indices] gone, merged to tldraw/editor
- [@tldraw/file-format] gone, merged to tldraw/tldraw

---------

Co-authored-by: alex <alex@dytry.ch>

packages/editor/src/lib/config/createTLStore.ts

@@ -1,13 +1,23 @@
 import { HistoryEntry, SerializedStore, Store, StoreSchema } from '@tldraw/store'
-import { TLRecord, TLStore, TLStoreProps, createTLSchema } from '@tldraw/tlschema'
-import { checkShapesAndAddCore } from './defaultShapes'
-import { AnyTLShapeInfo, TLShapeInfo } from './defineShape'
+import {
+	SchemaShapeInfo,
+	TLRecord,
+	TLStore,
+	TLStoreProps,
+	TLUnknownShape,
+	createTLSchema,
+} from '@tldraw/tlschema'
+import { TLShapeUtilConstructor } from '../editor/shapes/ShapeUtil'
+import { TLAnyShapeUtilConstructor, checkShapesAndAddCore } from './defaultShapes'
 
 /** @public */
 export type TLStoreOptions = {
 	initialData?: SerializedStore<TLRecord>
 	defaultName?: string
-} & ({ shapes: readonly AnyTLShapeInfo[] } | { schema: StoreSchema<TLRecord, TLStoreProps> })
+} & (
+	| { shapeUtils: readonly TLAnyShapeUtilConstructor[] }
+	| { schema: StoreSchema<TLRecord, TLStoreProps> }
+)
 
 /** @public */
 export type TLStoreEventInfo = HistoryEntry<TLRecord>
@@ -22,7 +32,7 @@ export function createTLStore({ initialData, defaultName = '', ...rest }: TLStor
 	const schema =
 		'schema' in rest
 			? rest.schema
-			: createTLSchema({ shapes: shapesArrayToShapeMap(checkShapesAndAddCore(rest.shapes)) })
+			: createTLSchema({ shapes: shapesArrayToShapeMap(checkShapesAndAddCore(rest.shapeUtils)) })
 	return new Store({
 		schema,
 		initialData,
@@ -32,6 +42,14 @@ export function createTLStore({ initialData, defaultName = '', ...rest }: TLStor
 	})
 }
 
-function shapesArrayToShapeMap(shapes: TLShapeInfo[]) {
-	return Object.fromEntries(shapes.map((s) => [s.type, s]))
+function shapesArrayToShapeMap(shapeUtils: TLShapeUtilConstructor<TLUnknownShape>[]) {
+	return Object.fromEntries(
+		shapeUtils.map((s): [string, SchemaShapeInfo] => [
+			s.type,
+			{
+				props: s.props,
+				migrations: s.migrations,
+			},
+		])
+	)
 }