Pinned posts (#5055)
* add to dropdown menu
* use normal profile mutation hook
* add pin as reason
* request pins
* shadow update
* rm logs
* get prev pinned from getProfile
* fix toasts
* invalidate after appview ready
* don't mutate params
* rm log
* use checkCommited rather than manual whenAppViewReady
* move to mutation
* even more optimistic optimistic update
* allow pins in `posts_and_author_threads`
* update @atproto/api
* add reasonPin type
* fix strange type error in unrelated query
* another missing type