Simplify game files structure

[guerro323]

bit of a mess as of now, the best would be to make component and systems files in the same folder

Structure suggestions:

Mixed theme structure

Components and systems of the same theme are in the same folder.
When there is too many components, it should be put into a special folder

eg:

Game/
  - GamePlay/
    - Units/
      - Components/
        - UnitArchetype.cs
        - UnitCurrentKit.cs
        - ...
      -      

Component/System folder structure into a common theme

This is almost already the way it work, but the Components/ folder should be put inside Game/

eg:

Game/
  - Components/
    - GamePlay/
      - Units/
        - UnitArchetype.cs
        - UnitCurrentKit.cs
        - ...
  - Systems/
    - GamePlay/
      - Units/
        - UpdateUnitPlayStateSystem.cs
        - UpdateUnitStatusEffectSystem.cs
        - ...
      -