Add "report issue" button in error component

[joepio]

Seems useful to make bug reports faster.

We can use this format:

https://github.com/[user]/[repo]/issues/new?title=[title]&assignee=[user]&body=[body]&labels[]=label1&labels[]=label2

[joepio]

Turns out we already have one in CrashPage.tsx! Should probably merge with ErrorPage