Feature: Edit previously sent generic webhook message (support "PATCH" request type)

[Skyedra]

Discord webhooks have a neat feature where you can edit a previously sent webhook later on by sending a "PATCH" request type.

Basically, after you do an initial "POST" webhook, the server will return an id field. You can then use this id when sending a PATCH to update the previously sent message.

[Half-Shot]

Yeah, love the idea. My vote would be to return an uniquely signed ID that the user can then send back to Hookshot on PATCH, verifying the ID to confirm event ownership.