Change Mutual Aid page format to match the Volunteers page.

[zacsolomon]

Current State
on https://ethiocovid19rt.com/mutualaid ..
the information is presented by embeding an AirTable spreadsheet directly into the page.

Desired State
on https://ethiocovid19rt.com/mutualaid ..
the information is presented in a similar way to the Volunteers page
https://ethiocovid19rt.com/volunteers

The Mutual Aid page will pull data from a Google Spreadsheet:
https://docs.google.com/spreadsheets/d/1xIQkSbUVoTh94Vsn3wq9cYCemoG3s7LA1Ug-Zt9Q_9k/edit#gid=0
and then put that directly on the Mutual Aid page in a manner which is more consistent with the ECRT website branding.

[nabebe]

initial version on feature/mutual_aid branch