[Cashtab] Add OrderBook (with no icon) to token info page

Summary:
Add OrderBook component to Token info page. Render it below the summary table and without an icon, as there is no icon.

Add conditional rendering to OrderBook so it can handle the case of no active offers.

Add dedicated component testing for OrderBook to confirm its behavior.

Test Plan:
npm test

this diff is live at https://cashtab-local-dev.netlify.app/

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D17064