Testcord Environment

[JayDwee]

Is your feature request related to a problem? Please describe.

currently the import of discord.ext.test as testcord is clunky, instead users will import discord.ext.Environment and will be able to either create multiple environments

Describe the solution you'd like

• investigate if creating multiple environments is possible, or if a singleton class will be needed instead
• Look at best names for this environment class (TestEnv, Env, Environment)
• Update unit tests
• Create the environment class
• Update documentation & readme to show how to use this new approach