Allow gift wrap (kind 1059) deletion by recipient (NIP-59 compliance)

[nogringo]

Allow recipients to delete gift wrap events (kind 1059) addressed to them via NIP-09 deletion requests.

NIP-59

Since signing keys are random, relays SHOULD delete kind 1059 events whose p-tag matches the signer of NIP-09 deletions or NIP-62 vanish requests.

[fiatjaf]

Let me know once you're done opening issues like #64.

[nogringo]

I'm done