useFollowedProfiles was fetching kind 0 events for all 435 followed
users via useAuthors on every page load, just to enable client-side
search matching. This sent a massive query to all relays unnecessarily.
Instead, useSearchProfiles now uses the already-cached follow list
pubkeys (from useFollowList) to sort relay search results, putting
followed users first without any extra network requests.
Alex Gleason
da963519ff