Adds an FPS counter to detect when there's a UI slowdown.
(btw, drive-by typo fix for a file)
https://github.com/tldraw/tldraw/assets/469604/b83d4b10-35d9-4584-af46-c63b5cc107ac
### Change Type
- [ ] `patch` — Bug fix
- [x] `minor` — New feature
- [ ] `major` — Breaking change
- [ ] `dependencies` — Changes to package dependencies[^1]
- [ ] `documentation` — Changes to the documentation only[^2]
- [ ] `tests` — Changes to any test code only[^2]
- [ ] `internal` — Any other changes that don't affect the published
package[^2]
- [ ] I don't know
[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version
### Test Plan
1.
- [ ] Unit Tests
- [ ] End to end tests
### Release Notes
- Adds FPS counter to debug panel.
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Co-authored-by: Steve Ruiz <steveruizok@gmail.com>
014a95cf51