Updates the Mafia UI (#79856)

## About The Pull Request

The player currently on the stand has a yellow color behind their name.
Players who have had their roles revealed now has that stated in the
player list
Votes no longer show up to people who are on trial


![image](https://github.com/tgstation/tgstation/assets/53777086/7b3b6128-4aa0-4a83-b7f6-54c9e9cde4d9)

Minor edit: It no longer says 'ON STAND', it instead has their name in
yellow background

![image](https://github.com/tgstation/tgstation/assets/53777086/d149a881-04ab-4a75-91e1-1e5f53dd1c7f)


## Why It's Good For The Game

Mafia UI's a little better now.

## Changelog

🆑
qol: Mafia panel no longer shows vote buttons if you're on stand, shows
the roles of revealed players, and list out who is on the stand, if any.
/🆑

---------

Co-authored-by: Jeremiah <42397676+jlsnow301@users.noreply.github.com>

code/modules/mafia/controller_ui.dm

@@ -29,6 +29,8 @@
 	if(turn)
 		data["turn"] = " - Day [turn]"
 
+	if(phase == MAFIA_PHASE_JUDGEMENT)
+		data["person_voted_up_ref"] = REF(on_trial)
 	if(phase == MAFIA_PHASE_SETUP)
 		data["lobbydata"] = list()
 		for(var/key in GLOB.mafia_signup + GLOB.mafia_bad_signup + GLOB.pda_mafia_signup)
@@ -41,8 +43,10 @@
 	data["timeleft"] = next_phase_timer ? timeleft(next_phase_timer) : 0
 
 	var/datum/mafia_role/user_role = get_role_player(user)
+
 	if(user_role)
 		data["user_notes"] = user_role.written_notes
+		data["player_voted_up"] = (user_role == on_trial)
 		var/list/ui_messages = list()
 		for(var/i = user_role.role_messages.len to 1 step -1)
 			ui_messages.Add(list(list(
@@ -56,6 +60,9 @@
 		player_info["name"] = role.body.real_name
 		player_info["ref"] = REF(role)
 		player_info["alive"] = role.game_status == MAFIA_ALIVE
+		player_info["role_revealed"] = FALSE
+		if(role.role_flags & ROLE_REVEALED)
+			player_info["role_revealed"] = role.name
 		player_info["possible_actions"] = list()
 
 		if(user_role) //not observer