[e.cash] Add tile section to homepage

Summary: Adding the tile section to the homepage now that core tech page is there

Test Plan: preview the site and scroll down to the section on the homepage. Check everything looks good and the links work

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: Klakurka, Fabien, bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D14035