Create a proper way to change Scenes from code

[dsge]

From code:

• it should be able to give a list of where the player could go (what warp points exist on the map, and what warp points exist in the world)
• when a player wants to go to a different map, it should handle the scene switching (if needed) correctly
• it should handle global components (and the player) correctly upon switching scenes
• the initial loading of the first scene should also go through this