Problem: can't add user to Identity Tree

[gsovereignty]

Problem: can't add user to Identity Tree

Solution:

Display all the users who have a username and bio but are not in the Identity Tree.

Allow user to add them, show some warnings about making sure they are a real human.

An event must be produced:
event.Content MUST be JSON that unmarshalls into: https://github.com/nostrocket/engine/blob/7ddd707f45295fa75bb8c2c1cea5c11643f25a81/consensus/identity/types.go#L41

	Target     string `json:"target"` //The pubkey of the user they want to add to the Tree
	Maintainer bool   `json:"maintainer"` //TRUE if they want to add them as a Maintainer
	USH        bool   `json:"ush"` //TRUE if they want to just add them as a Unique Sovereign Human (not a bot)
	Character  bool   `json:"character"` //TRUE if they want to vouch for their integrity and not just their human-ness.

As with all Events intended to cause a state change, this Event MUST include the correct r tag (see #2 and #1 )