Purchase (or donate) Purple without having Damus profile/iOS

[alltheseas]

user story

As someone who would like to support nostr development, I would like a way to purchase Damus for myself or a friend without having access to iOS Damus profile or app, so that I support the Damus dev team.

acceptance criteria

1. Damus user can select a friend/follow, and sub to purple on their behalf of Damus
2. Upon donation, their friend receives Damus purple benefits
3. The donator (i.e. the payor) does not have to have Damus to make this purchase/donation
4. The donator (i.e. the payor) can purchase purple for themselves

[alltheseas]

https://damus.io/note1fzfj0jnnlysam5663gd2snly6xqqadcvmhsvm28w0gqvsmhzgf8qapfn08

[alltheseas]

TG

[alltheseas]

@danieldaquino we can do this as a follow on ticket to #1754 subscribe on website, where we can test via subscribe flow if donate purple is a good experience

[alltheseas]

Customer demand from android user

https://damus.io/nevent1qqsrcea6jsnhnrvt3j9um63v0akv2l2w5e77w4wf948yhdmg64trpcgpp4mhxue69uhkummn9ekx7mqpz3mhxue69uhhyetvv9ujuerpd46hxtnfduq5xamn8ghj7mmcw3exgetkv9mrvdr6xc68jc3h0qm8y6n8x3h8g7n3df5x2erdx43r27n2w96kcat8ddhxs7njxsmxu7fjw93xzepwdahxjmmwqyw8wumn8ghj7mn0wd68ytnzd96xxmmfdejhytnnda3kjctvxs2xgq