Alert for content editors on incorrect block usage

[cogniSyb]

We should display an alert on non production environments when the content editor adds a v2 block on the page that is not a v2-redesign page. This will allow incorrect use of a component to be spotted more quickly and reduce errors and questions in the future.

• Will we also add an alert when a non-redesign block is used on a redesign page?

Requirements

• Check whether we’re on a develop/preview URL
• Check whether we’re on a redesign page
  • Check whether a v2 block is present on a page (a block that starts with v2-)
  • Check whether a whitelisted block is present on a page
• Mention which block is used that is 'in violation'

[shirin27]

Kamino cloned this issue to hlxsites/vg-volvotrucks-us