opponent info: use long npc name if available

This name is used on the in game hd hud (eg "Baby Muttadile" instead of "Muttadile")

runelite-api/src/main/java/net/runelite/api/ParamID.java

@@ -29,6 +29,10 @@ package net.runelite.api;
  */
 public final class ParamID
 {
+	/**
+	 * Long name for NPCs used in the HP hud
+	 */
+	public static final int NPC_HP_NAME = 510;
 	/**
 	 * @see SettingID
 	 */