Cashu NIP

# Description

Cashu x Nostr

In the apps/mobile/modules/CashuWallet, we used several hooks and storage. WE need to used the hooks of NOstr by default, and have the localstorage on top (not the prior and the trusted one).

We have already a few hooks implemented in the packages/afk_nostr_sdk, now we need to finish the implementation in the apps/mobile/modules/CashuWallet.

- [ ] Mint trusted by users
- [ ] Create wallet Nostr event: id, name, relay, mints
- [ ] Token event: proofs
- [ ] get spendind events: in, out
- [ ] verify proofs spent and unused and do the clean
- [ ] save cash
- [ ] delete old proof
- [ ] Nutzap
- [ ] -add emoji ecash