[Enhancement] Add CommandFactory class

[maxkoshevoi]

Summary

Add CommandFactory.Create() that automatically resolves what command (sync or async) user is trying to create and returns an instance of it.
This is helpful because if some method will become async or sync, Create() would automatically return command of needed type. And in general, when creating a command user wouldn't need to think what type it would be, they just need to call Create on whatever method they have.

API Changes

• static CommandFactory.Create()

Intended Use Case

Replace new Command or new AsyncCommand with CommandFactory.Create:

Who Will Do The Work?

• I am willing to take this on myself
• Just putting this out there for someone to pick up