Add Error Handling to FAQ

[alexkrolick]

Explain potential issues with .catch in async calls, and some examples where Error Boundaries would be useful.

[bvaughn]

Worth mentioning that this issue is a follow up from this comment on PR #43.

[migueloller]

There's been some minor discourse on this here.

[benlaverriere]

With #308 merged, can this be closed?

[sinhaniik]

hello, I see this pr open (and further it is merged) can you guys confirm that this issue is open to contributing or is this already closed?