worldpoint: add toWorldArea() function that returns a 1x1 WorldArea of the WorldPoint (#2870)

runelite-api/src/main/java/net/runelite/api/coords/WorldPoint.java

@@ -244,6 +244,16 @@ public class WorldPoint
 		return worldPoints;
 	}
 
+	/**
+	 * Converts a WorldPoint to a 1x1 WorldArea.
+	 *
+	 * @return Returns a 1x1 WorldArea
+	 */
+	public WorldArea toWorldArea()
+	{
+		return new WorldArea(x, y, 1, 1, plane);
+	}
+
 	/**
 	 * Rotate the coordinates in the chunk according to chunk rotation
 	 *