[e.cash] Chart section animations and source link

Summary:
The digital payment landscape section (third homepage section) had some unused animations that I'm removing here. The animations were added before we had framer motion going, so now they are just playing before the section animates in and potentially wasting a bit of performance
Also adding the source link for the chart

Test Plan: preview and check

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D18521