Investigate default "community health" files for HfLA org

Repositories can include "community health" files like a CONTRIBUTING guide, or a CODE_OF_CONDUCT.

There is also a way to create *default* "community health" files for an org, such that they are available to all repositories in that org (unless specifically overwritten).

This would give HfLA a way to centrally manage e.g. a CODE_OF_CONDUCT and ensure it is included in every HfLA repository. There is even a new FUNDING file that creates a "Sponsor" button in the repo to direct users to a fundraiser page e.g. our Hacker.Fund sponsorship form!

More reading:

* [Creating a default community health file](https://help.github.com/en/articles/creating-a-default-community-health-file-for-your-organization)

* [Displaying a sponsor button in your repository](https://help.github.com/en/articles/displaying-a-sponsor-button-in-your-repository)