Adding Enterprise Support to github shell plugin

[eedgar]

• Fixes for github enterprise tokens
• WIP: add enterprise support to gh

Overview

Adding Support for Github Enterprise Tokens as they are separated from Github Tokens

Type of change

- [ ] Created a new plugin - [X] Improved an existing plugin - [ ] Fixed a bug in an existing plugin - [ ] Improved contributor utilities or experience ## Related Issue(s) * Resolves: # * Relates: # ## How To Test

Changelog

Allow users to authenticate to an Github Enterprise Server