Add optional round-target billboard display

src/main/resources/config.yml

@@ -6,6 +6,11 @@ ui:
   titles: true
   actionbar: true
   scoreboard-update-interval-ticks: 10
+  # Global switch for the optional billboard: a BlockDisplay entity placed via
+  # /blockparty setbillboard <arena> that visually mirrors the currently selected
+  # target color each round. Also requires the per-arena billboard to be set and
+  # enabled (billboard-enabled in the arena's yml, default true).
+  billboard: true
 
 sounds:
   join: ENTITY_EXPERIENCE_ORB_PICKUP

src/main/resources/messages.yml

@@ -20,6 +20,8 @@ admin:
   lobby-set: "<green>Lobby set for '%arena%'.</green>"
   spawn-set: "<green>Spawn set for '%arena%'.</green>"
   spectator-set: "<green>Spectator location set for '%arena%'.</green>"
+  billboard-set: "<green>Billboard set for '%arena%'. It will display the target color each round.</green>"
+  billboard-removed: "<green>Billboard removed for '%arena%'.</green>"
   pos1-set: "<green>Position 1 set for '%arena%'.</green>"
   pos2-set: "<green>Position 2 set for '%arena%'.</green>"
   floor-set: "<green>Floor palette for '%arena%' set to %count% material(s).</green>"