Adding several layers named "exit" causes issues with Phaser 3.
This PR makes any possible layer being an exit layer (it only depends on the exitUrl property)
Also, fixing start position (it takes into account the layer width now)
- Create position and check if user is in position to switch in the next scene.
- When scene is load, we load all scene in the layer of name "exit".
- Layer "exit" of map.json have a parametter "exitSceneKey" to identify next scene.
- Add layer "start", the player could start in the scene on the object present in the layer of name "start".
- Add all map json in back
- Create middleware to check authentification user
- Create controllers to get map
- Create access to get all files in folder Assets/Maps
