Add `whitenoise.search_users` method (name can be changed)

[erskingardner]

We need to have a method that allows the front-end to make a NIP-50 search req to nostr relays to try and find kind:0 events (users) on the network.

This should support searching by hex pubkey, npub, nip-05, display_name, and name - which I believe NIP-50 does by default anyway.

[jgmontoya]

👋 I see there's an implementation of search_users in src/nostr_manager/search.rs. Is the task here to mainly expose that already implemented method or does that implementation have problems and we should attempt a new one?

Just to clarify, what should the method signature look like? Should it be whitenoise.search_users(query: &str) or are there other parameters we should support? What should the returned user objects contain? It should be instances of EnrichedContact, correct?

[jgmontoya]

BTW this got deleted on this PR: #318 just in case this is relevant for the future we know where to look 😅

[erskingardner]

Just to clarify, what should the method signature look like? Should it be whitenoise.search_users(query: &str) or are there other parameters we should support? What should the returned user objects contain?

The method should take a search query string that could match a lot of different fields on the user's metadata (name, display_name, nip05, about, etc.).

My semi-naive take on this would be that we have the ability now to do super fast search against our own user database in the app as a first pass. This could live filter the list on the front-end and then we would have some mechanism to actually do a direct NIP-50 search query to relays to see if we can find anyone else that isn't already in the user table.