Save scene feature completed for the level editor

Right now, the save scene feature is completed for the level editor. For the moment, we have some problems with importing our own assets into unity, so the video below is just a demo of how we can save the scene we build via the level editor as a text file so we can use for later on.

For next week:

Importing our own objects as prefabs and integrate with the level editor

Make level editor more functionality, such as reading scenes, and rename, etc.