Parse and publish hashtags in notes when posting

[joshuatbrown]

Issues covered

https://github.com/verse-pbc/issues/issues/44

Description

Parses hashtags from posts and includes them as actual hashtags as defined in NIP-24.

How to test

1. Tap the Post button
2. Type some text with a hashtag (like #photography)
3. Post the note
4. Inspect the source for the note and find the t: photography in it.

Screenshots/Video

[mplorentz]

👀

[mplorentz]

I love that we have this feature now! One request and one thought:

• NIP-27 says that hashtags must be lowercased. I think if someone inputs #HaShTaG we need to add it to the tags as hashtag.
• I'm not sure how hashtags work elsewhere, but I don't like that they are only terminated with whitespace or the end of the string. I expected punctuation to also terminate them. For example, I expected check out my #hashtag! to add the hashtag hashtag. I'm flexible on this one.

[joshuatbrown]

@mplorentz thanks for the request and thought! I've implemented both, so it's ready for another review.

[mplorentz]

Awesome, thanks!