Automate the creation of shop pages or inform the user

[razvanaldea89]

Either create the pages automatically with the corresponding shortcodes inside when activating the "Shop" functionality, or add a "Create pages" button so that the user will create the pages when the time requires or inform the user about the need to create/insert shortcode/select page from the Settings part.

[cristianraiber]

This should be part of Q2-3 efforts of 2023 once we start focusing more on the Shop functionalities of DLM.

[razvanaldea89]

The creation of No Access page has already been implemented. The pages for the shop will also be created automatically once we re-make the shop functionality.