[contributor-docs] Add a guide for creating a new repository

h2. Problem

Creating a new repository is not as simple as pressing the "plus" button on GitHub. There are two things that we ought to communicate for people who want to create a repo. First, there are a series of settings that an admin should make to ensure that the repo is configured in a standard way. Right now, these steps live in a private doc. Furthermore, if the repo will represent a package, then the module template should be used to create the repo. This ensures that the package is set up in a standard way.

h2. Acceptance Criteria

* The guide mentions and links to the private repo configuration doc
* The guide mentions the module template for package repos

Start by locating the contributor documentation structure, then review the private repository configuration document and the module template referenced in the issue. The guide is done when it explains the standard repository settings, links to the configuration document, and mentions the module template for package repositories.

Written by the indexing model from the issue text.