fix dotcom worker bundle size (#4030)

before

     out/index.js  1.1mb ⚠️
     
after
 
     out/index.js  275.9kb

🤦🏼 

### Change Type


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

- [ ] `feature` — New feature
- [ ] `improvement` — Product improvement
- [ ] `api` — API change
- [ ] `bugfix` — Bug fix
- [x] `other` — Changes that don't affect SDK users, e.g. internal or
.com changes


### 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.

packages/tlsync/src/lib/TLSocketRoom.ts

@@ -1,4 +1,5 @@
-import { StoreSchema, UnknownRecord, createTLSchema } from 'tldraw'
+import type { StoreSchema, UnknownRecord } from '@tldraw/store'
+import { createTLSchema } from '@tldraw/tlschema'
 import { ServerSocketAdapter } from './ServerSocketAdapter'
 import { RoomSnapshot, TLSyncRoom } from './TLSyncRoom'
 import { JsonChunkAssembler } from './chunk'