Handle njump me links

[mplorentz]

Issues covered

This is related to #367, but it doesn't quite cover all of it and that ticket isn't prioritized so I'm not going to move it into the sprint or anything. @rabble was complaining about this so I was going to write up a comment about how to do it but it was so easy that ended up just doing it.

Description

This adds code to handle the links njump.me is using if you tap "Open in Nos" from their site.

How to test

1. In Nos on an iPhone (not macOS), tap "Copy link" on a note or profile.
2. Paste the link into Safari
3. Tap the four squares icon in the bottom right of the screen next to "open in your default app"
4. The next part depends on what version of the app you are running. If you are running the production app you can just tap Nos. Otherwise tap and hold on Nos and drag the link into the notes app. Then tap "Edit link" and change the beginning from "nos:" to "nos-dev:" or "nos-staging" depending on what version of the app you are using. Then tap "Done" and tap the link.

The Nos app should open and display the note or profile.

Screenshots/Video

RPReplay_Final1717080608.MP4

[martindsq]

I'm happy njump is working now! We should add support for the nostr: scheme. I think this kind of things are super important.

[martindsq]

Can we move this regex to a new shared place? Even though the regex could be not 100% the same and could not be shared, we are repeating patterns for some things and I found myself sometimes having to fix a problem with one regex and having to search for the other ones to see if the same error could occur there. Just a centralized place where we put all regexes could help to identify potential issues.

[mplorentz]

I want to add support for nostr: too. I considered refactoring NoteParser and this code to share a regex, but I didn't because this was just a few minutes of work that I didn't want to throw away because it seemed really useful. I didn't want to (probably) quadruple the time I spent on it to do a refactor. I tried to pull out the shared part of the regex into a constant, but you can't interpolate a regex literal inside another regex literal, so I would have to switch to NSRegularExpression or something, which would require more code refactoring... and that would only be for the regex itself. To share the code that extracts the hex from bech32 would require some more.

Given that this is the second place we are using the regex I'm ok with duplicating it. I like the rule of waiting to refactor until you've copied code in three places rather than two.

[martindsq]

Fair enough. Let's keep the eyes open for the next time we need to add or modify a regex to include that refactor in the scope of the ticket.

[joshuatbrown]

Excited to have this!