feat: error boundary for react

[soofstad]

To catch errors, and stop the page from freezing/going white, we should add a top level ErrorBoundary

[olavis]

@soofstad this sounds like a bug? Do you have screenshots or steps to reproduce?

[soofstad]

This is not so much a bug report, as a suggestion to add an example of an error boundary. Which is often needed in most apps.