Create a comprehensive `conf.py` reference

# Background

Currently, the `conf.py` values used by the Starter Pack are only documented through code comments. These comments don't comprise a complete reference and clutter up the `conf.py` file itself.

# Request

* Document each of the configuration values used by the Starter Pack
* Remove the bulk of the code comments from the `conf.py` file and instead link to the aforementioned page