Refactor ansible command into it's own file

[PhillSimonds]

Environment

• Python version: all supported versions
• schema-enforcer version: 1.1.0

Proposed Functionality

This issue proposes moving ansible command denoted in cli.py into it's own file, and moving others to something like core.py The thought process is that, if ansible is an optional dependency, it would make sense to extract the built-in commands from those which are add-ons. The architecture will proliferate to other optional dependencies, like nornir or others.

Use Case

The schema-enforcer ansible commands (e.g. schema-enforcer ansible <sub-command>) will run exactly as they do now, but will be imported from their own file instead of directly referenced in cli.py.