[e.cash] Sub-page hero section

Summary:
Adding the first section for the wealth redfined page. Most of the sub pages of the site have the same format for their top section
So I made a component that takes the animated image and text content for it, so we can reuse throughout

Test Plan:
@bot preview-e.cash
navigate to the wealth-redefined page and check the top section looks good on mobile, desktop, and both themes

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D13915