Approved post content field should be a json version of previous unapproved event

[bigOconstant]

As I continue to play with the community spec i've noticed another problem with zapddit's implementation that will break compatibility. And the reason it's post don't show in some clients.

The approved post's content should be the previous event in json. In the same style as nip-18 Basically like a repost.

The resulting post won't show in clients like Amethyst.

https://github.com/nostr-protocol/nips/blob/master/72.md#post-approval-by-moderators

Creating a Issue for visibility.