Add rtconfig for forced dead npcs

runelite-client/src/main/java/net/runelite/client/RuntimeConfig.java

@@ -43,6 +43,7 @@ public class RuntimeConfig
 	private Map<String, String> outageLinks;
 
 	private Set<Integer> ignoreDeadNpcs;
+	private Set<Integer> forceDeadNpcs;
 
 	public boolean showOutageMessage()
 	{

runelite-client/src/main/java/net/runelite/client/game/NpcUtil.java

@@ -109,6 +109,12 @@ public class NpcUtil
 					{
 						return false;
 					}
+
+					Set<Integer> forceDeadNpcs = runtimeConfig.getForceDeadNpcs();
+					if (forceDeadNpcs != null && forceDeadNpcs.contains(id))
+					{
+						return true;
+					}
 				}
 
 				final NPCComposition npcComposition = npc.getTransformedComposition();