Add support for Pagination / Load More

[mtongen]

Description

I would like to see support for pagination available within a single WP-Curate block or across WP-Curate blocks so that it doesn't have to be built from scratch each time.

Use Case

This has proved to be a more complex feature and we've added it across a few projects now. It might be more efficient to standardize that approach based on prior art.

Comments

• Deduplication is going to be difficult to implement as part of this feature, so for the initial buildout, let's not worry about deduplicating pages after page 1.
• This is a great use case for the Interactivity API.

[mtongen]

It would help to incorporate native GraphQL functionality to get the number of posts.