[e.cash] Add team list to about page

Summary:
Adding the team list to the about page.
The mockup calls for a different style than the homepage version, so breaking out
the team content to data to avoid duplication.

Test Plan: preview and check

Reviewers: #bitcoin_abc, Mengerian

Reviewed By: #bitcoin_abc, Mengerian

Subscribers: Mengerian

Differential Revision: https://reviews.bitcoinabc.org/D18528