feat: Map.Broadcast(ushort, Func<Player, string>) overload. (#447)

* feat: Spawning NPCs via RA adds them to the `Npc.List`

* Update RemoteAdminNpcCommandAddToDictionaryFix.cs

RemoteAdminNpcCommandAddToDictionaryFix is now static.

* Code style changes.

Co-authored-by: Yamato <66829532+louis1706@users.noreply.github.com>

* Documentation fix.

* feat: Map.Broadcast(ushort, Func<Player, string>) overload.

---------

Co-authored-by: Yamato <66829532+louis1706@users.noreply.github.com>

Author: Num10ck

EXILED/Exiled.API/Features/Map.cs

@@ -133,6 +133,17 @@ public static void Broadcast(ushort duration, string message, global::Broadcast.
             Server.Broadcast.RpcAddElement(message, duration, type);
         }
 
+        /// <summary>
+        /// Broadcasts delegate invocation result to all <see cref="Player">players</see>.
+        /// </summary>
+        /// <param name="duration">The duration in seconds.</param>
+        /// <param name="func">The delegate whose invocation result will be the message.</param>
+        public static void Broadcast(ushort duration, Func<Player, string> func)
+        {
+            foreach (Player player in Player.List)
+                player.Broadcast(duration, func.Invoke(player));
+        }
+
         /// <summary>
         /// Shows a hint to all <see cref="Player">players</see>.
         /// </summary>