Add method to get the clickable area of a TileObject

getClickbox returns an AWT Area object which corresponds to theclickable area of a GameObject, GroundObject, DecorativeObject or WallObject.

getClickbox for ItemLayers isn't implemented, since I haven't looked into how clickabilty works for items on the ground in the client.

runescape-api/src/main/java/net/runelite/rs/api/RSGroundObject.java

@@ -25,6 +25,7 @@
 package net.runelite.rs.api;
 
 import net.runelite.api.GroundObject;
+import net.runelite.api.Renderable;
 import net.runelite.mapping.Import;
 
 public interface RSGroundObject extends GroundObject
@@ -38,4 +39,7 @@ public interface RSGroundObject extends GroundObject
 
 	@Import("y")
 	int getY();
+
+	@Import("renderable")
+	Renderable getRenderable();
 }

runescape-api/src/main/java/net/runelite/rs/api/RSTile.java

@@ -71,5 +71,6 @@ public interface RSTile extends Tile
 	int getY();
 
 	@Import("plane")
+	@Override
 	int getPlane();
 }

runescape-api/src/main/java/net/runelite/rs/api/RSWallObject.java

@@ -24,6 +24,7 @@
  */
 package net.runelite.rs.api;
 
+import net.runelite.api.Renderable;
 import net.runelite.api.WallObject;
 import net.runelite.mapping.Import;
 
@@ -49,6 +50,12 @@ public interface RSWallObject extends WallObject
 	@Override
 	int getOrientationB();
 
+	@Import("renderable1")
+	Renderable getRenderable1();
+
+	@Import("renderable2")
+	Renderable getRenderable2();
+
 	@Import("config")
 	@Override
 	int getConfig();