Create a persistent client side error log

[julianjelfs]

Rollbar is not great for finding issues because a) we constantly blow our allocation and b) we don't get enough context. Quite often something weird happens and I'm either on my phone or don't have a console open and the information about what happened is lost.

If would be nice to have an indexeddb based client side error log so that we can see what happened after a restart. Would also potentially be useful for diagnosing user's issues.

Might also be feasible to batch ship client error logs to some IC endpoint in the future.