WIP: Physics sim

[FlameKnight137]

Closes #2

[sagarreddypatil]

Still need to do the following things

1. Add option to change the properties of any object by clicking on it
   • All objects should have the option to change static and dynamic friction
   • Dynamic objects(such as the cube) should have the option to change the mass, in addition to static and dynamic friction
2. Give the scenes simpler names. "Physics Basic Simulation InVisionAR" can be changed to "Basic Physics Simulation"
3. Use a plane instead of the terrain object.
4. Organize all assets into their respective folders(Physic materials go to the Physic Materials folder, etc.)
5. Delete all unnecessary assets(NewLayer, Terrain, anything that isn't being used.

I don't get why you still haven't done the object editing yet. That is one of the basic requirements for this task.

[sagarreddypatil]

Also, there was literally absolutely no reason to close the pull request. Please don't close a PR unless you are told to do so.

[FlameKnight137]

Sorry about that. Also, just to make it clear for you, I did have a section for the physics material where you can edit the mass, static friction. etc. if you click on the object and click the respective physics material to change it. Also, I have updated these values already with the recent push so please check that. Thank you!