Add a hook help

Problem/Motivation

The Baguettebox module is a bit difficult to set up for new people in the Drupal community
hook help will make module documentation easier to find.

Steps to reproduce

Proposed resolution

Create a hook help (see : https://api.drupal.org/api/drupal/core%21modules%21help%21help.api.php/f...)

Remaining tasks

User interface changes

API changes

Data model changes