* NIP-29: Simple Group Chat.
* split hostname and subgroup path into two different tag items.
* add and remove permissions actions.
* fix kind number for moderation event.
* add missing / to "flavors" in example.
* some new ideas + making this universal and not only applicable to chat.
* fix delete-message => delete-event.
* flesh out the entire thing.
* saner approach with multiple kinds for moderation.
* delete-event as kind 9005.
* update meta events description.
* `public` and `open` tags and join request event.
* edit-group-status permission.
* add kinds to README.
* add kind:12
* add nip-10 note
* add optional list of members
* admins prefixed by "p".
* remove "alt" from event templates for brevity.
* add kind 10009 for public list of simple groups.
* update "previous" stuff.
* remove naddr stuff, use a different identifier format.
* remove reference to trimmed signatures until that is more developed.
* add kind:10 threaded chat replies.
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Co-authored-by: Pablo Fernandez <p@f7z.io>
