Rename `@tldraw/tldraw` to just `tldraw`! `@tldraw/tldraw` still exists
as an alias to `tldraw` for folks who are still using that.
### Test Plan
- [x] Unit Tests
- [ ] End to end tests
### Release Notes
- The `@tldraw/tldraw` package has been renamed to `tldraw`. You can
keep using the old version if you want though!
Closes#2800
This PR makes it so that `check-scripts` will error out if you forget to
add a "references" entry to a tsconfig file when adding an internal
dependency in our monorepo.
If these project references are missed it can prevent TS from
building/rebuilding things when they need to be built/rebuilt.
### Change Type
- [x] `internal` — Any other changes that don't affect the published
package[^2]
