Solar System v1.1

Created by Cuong Dang (dangvu@msu.edu) - Michigan State University 

Note:
- The image for hierachy/file organization is organize.png (downloadable below).
- Please test on Windows (this game was built on Windows) for accurate performance. WebGL testing may result in too small minimap.

Modifications:
- Added Venus, Mercury, and Saturn, and changed Sun's color
- Created another 6 prefabs to spawn weird stuff that is completely unrelated to planets, such as Drake, Gojo, deer, a random comet Vtuber, etc., and added another two comet spawner and four random asset spawner
- Randomize spawn position within certain range of spawner 
- Create an object that has 1% spawn chance every 0.5 seconds (when appear, the object will have a bright white halo following it), with 30s wait time after a successful spawn
- Used List<GameObject> to create a list of objects to spawn from with randomized order, with 4s wait time between spawn intervals