API Reference docs update

docs/api/world.rst

@@ -0,0 +1,23 @@
+.. _world_api:
+World
+=====
+
+This module provides an implementation for the World files from Tiled.
+
+See `Tiled's docs for Worlds <https://doc.mapeditor.org/en/stable/manual/worlds/>`_
+for more info about worlds and what they do.
+
+The functionality within PyTiled Parser is to load the world and outline the size
+and position of each map, and provide the path to the map file. Loading a world
+does not automatically load each map within the world, this is so that the game
+or engine implementation can decide how to handle map loading.
+
+WorldMap
+^^^^^^^^
+
+.. autoclass:: pytiled_parser.world.WorldMap
+
+World
+^^^^^
+
+.. autoclass:: pytiled_parser.world.World