Seller Experience - Add Payments Block content to editor help popup

[blackjackkent]

After educating the user on the payment block as part of the in-editor tour, let’s make sure there is a way back to the support documentation via the help dialog.

When clicking the “?” button in the editor, the user should be greeted with a dialog containing a few links that might interest them. If they have selected the "sell" intent during onboarding and followed the "Started Simple" path (i.e. if there is a payments block in the content of the editor), one of these links should be “The Payments Block”. Clicking on this link should open up the same content the user originally saw in the editor tour.

Clicking “read more” in this panel should open up the support page.