Admin create antagonist/re-roll antagonist (#4971)

## About The Pull Request

- Adds a prompt when an admin is removing someone's antagonist datum if
they would like to re-roll for a new antagonist to replace them
- Brings back the Create Antagonist verb
- When creating an antagonist, it tells the admin who was selected

## Why It's Good For The Game

Admin quality of life

## Changelog

🆑 LT3
admin: Admin button in the traitor panel to automatically re-roll
antagonists
admin: Admin create-antagonist verb
admin: Game logs now include what player gets turned into an antagonist
/🆑

code/datums/mind/_mind.dm

@@ -461,6 +461,17 @@
 	else if (href_list["obj_announce"])
 		announce_objectives()
 
+	// BUBBER EDIT ADDITION BEGIN - ANTAG RE-ROLLING
+	else if (href_list["reroll_antag"])
+		var/datum/antagonist/antag = locate(href_list["reroll_antag"]) in antag_datums
+		if(!istype(antag))
+			to_chat(usr, span_warning("Invalid antagonist ref to be removed."))
+			return
+
+		SSgamemode.reroll_antagonist(antag_name = name)
+		antag.admin_remove(usr)
+	// BUBBER EDIT ADDITION END - ANTAG RE-ROLLING
+
 	//Something in here might have changed your mob
 	if(self_antagging && (!usr || !usr.client) && current.client)
 		usr = current