Previously, we were using touch and mouse events to detect when we were
in coarse/fine pointer mode. The problem with this is that many mobile
devices emulate mouse events for backwards compatibility with websites
not built for touch - so many touch events result in mouse events too.
The solution to this is to use the unified pointer events API, and check
the `pointerType` property to determine the device the user is using.
This diff also contains some changes to make it so that multiplayer
rooms "just work" over the LAN when devloping locally.
### Change Type
- [x] `sdk` — Changes the tldraw SDK
- [x] `bugfix` — Bug fix
### Release Notes
- Fix a bug where coarse-pointer mode would get incorrectly detected on
some touch devices
af664d55df