Changenow section on token page

We are integrating Changenow imminently, and this will allow people to very easily obtain JOY. We should add a new section to the token page which exposes the buy now widget right on the page, and some context, so as to allow people to start the trade right there.

# Requirements

- Add a new section with title: "Instantly Buy or Sell"
- mini title: "INSTANT SWAP"
- Explains the benefits very visibly
- No signup
- No KYC
- Less than 3 minutes.
- +200 Currencies supported
- Remind the user somehow they need to pick a wallet and install it if the are going to buy JOY.
- Embed some suitable styled widget which is focused on buying JOY by default, but also allows selling.
- Placed after exchange section but before earn section