Add link to store and npm components

Summary: Add Chrome Store image linking to Cashtab extension, dev tool links to cashtab-components npm pkg and storybook

Test Plan: Run locally and inspect bcha.html. Confirm active links and tile responsiveness.

Reviewers: Mengerian, #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D8797