Rename folder of package for Asset store

[msanatan]

Feedback from the asset store:

The name of your asset’s base folder should be either your publisher name or the name of the package. Please rename it. (https://assetstore.unity.com/publishing/submission-guidelines, Section 2.1.a)

Guidelines:

2.1.a Packages are nested under one "root" folder. Exceptions include assets in the folders outlined in the Special Folders and Script Compilation Order documentation (for example, "Gizmos" or "Editor Default Resources").

We should rename the folder to MCPForUnity or Coplay/MCPForUnity. I prefer the former

@justinpbarnett @dsarno @Scriptwonder