Remove indicator for autosize text shapes while editing (#2120)

This PR is a fork of #2119

It only has one of the two changes:

* Remove indicator for autosize text shapes while editing.

![2023-10-26 at 13 55 56 - Chocolate
Anaconda](https://github.com/tldraw/tldraw/assets/15892272/ee54db05-e96d-40e6-8003-cc013894f6f9)

I think we should merge this one, and continue discussion of the other
one (alignment).


### Change Type

- [x] `minor` — New feature

### Test Plan

1. Click to draw a text shape.
2. You shouldn't see the shape's indicator while editing it.
3. Drag to draw a text shape.
4. You *should* see the shape's indicator while editing it.

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

### Release Notes

- Removed the indicator from autosize text shapes.

packages/tldraw/api-report.md

@@ -1105,7 +1105,7 @@ export class TextShapeUtil extends ShapeUtil<TLTextShape> {
         width: number;
     };
     // (undocumented)
-    indicator(shape: TLTextShape): JSX.Element;
+    indicator(shape: TLTextShape): JSX.Element | null;
     // (undocumented)
     isAspectRatioLocked: TLShapeUtilFlag<TLTextShape>;
     // (undocumented)

packages/tldraw/api/api.json

@@ -12553,6 +12553,10 @@
                   "text": "JSX.Element",
                   "canonicalReference": "@types/react!__global.JSX.Element:interface"
                 },
+                {
+                  "kind": "Content",
+                  "text": " | null"
+                },
                 {
                   "kind": "Content",
                   "text": ";"
@@ -12561,7 +12565,7 @@
               "isStatic": false,
               "returnTypeTokenRange": {
                 "startIndex": 3,
-                "endIndex": 4
+                "endIndex": 5
               },
               "releaseTag": "Public",
               "isProtected": false,

packages/tldraw/src/lib/shapes/text/TextShapeUtil.tsx

@@ -17,6 +17,7 @@ import {
 	textShapeMigrations,
 	textShapeProps,
 	toDomPrecision,
+	useEditor,
 } from '@tldraw/editor'
 import { createTextSvgElementFromSpans } from '../shared/createTextSvgElementFromSpans'
 import { FONT_FAMILIES, FONT_SIZES, TEXT_PROPS } from '../shared/default-shape-constants'
@@ -141,6 +142,8 @@ export class TextShapeUtil extends ShapeUtil<TLTextShape> {
 
 	indicator(shape: TLTextShape) {
 		const bounds = this.editor.getShapeGeometry(shape).bounds
+		const editor = useEditor()
+		if (shape.props.autoSize && editor.editingShapeId === shape.id) return null
 		return <rect width={toDomPrecision(bounds.width)} height={toDomPrecision(bounds.height)} />
 	}