[e.cash] Update ecashv2/Home copy (Teamlist and GettingStarted)

Summary: Adding useful links to getting started and referencing Bitcoin ABC in team section. And a few general copy changes.

Test Plan: npm run and review /home team and getting started section

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D18705