rearrange export / import from tldraw to help builds (#2739)

It seems like if the downstream build using tldraw has a different build
setup you can run into this issue where it complains that tldraw is
exporting before importing. Prettier tries to undo this so this
preserves the order of things.

### Change Type

- [x] `patch` — Bug fix

### Release Notes

- Build: Help with import/export error on some builds.

packages/tldraw/src/index.ts

@@ -169,6 +169,10 @@ export {
 	serializeTldrawJsonBlob,
 	type TldrawFile,
 } from './lib/utils/tldr/file'
-export { Dialog, DropdownMenu }
+
 import * as Dialog from './lib/ui/components/primitives/Dialog'
 import * as DropdownMenu from './lib/ui/components/primitives/DropdownMenu'
+
+// N.B. Preserve order of import / export here with this comment.
+// Sometimes this can cause an import problem depending on build setup downstream.
+export { Dialog, DropdownMenu }