Block Library: Add pagination to the Latest Posts block.

[epiqueras]

Description

This PR adds basic single stepped pagination to the Latest Posts block posts list. In the future, we might want to look at adding more customization options.

How to test this?

Verify toggling pagination on enables pagination for the post list both in the editor and front end and that things work as expected. E.g. The previous link only renders if there is a previous page, and the next link only renders if there is a next page.

Screenshots

Types of Changes

New Feature: The Latest Posts block now supports pagination.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[mtias]

I am not sure about supporting this feature on this block at the current time due to how it coerces a server implementation that bypasses the natural template structure of a site into dealing with query vars. The demands for such a feature are largely due to the absence of queries (Query), which would address that fundamental issue and ideally connect with the relevant template resolution and query context. Supporting this preemptively in Latest Posts could signal a wrong preferred way of supporting blog pagination in general and color its adoption.

[epiqueras]

I agree. I would much rather wait for the Query block and potentially deprecate this block. I just thought this feature was a more immediate need. I'll close it then.

[mtias]

I think there might still be some use cases for this in the block in the future, likely if we can pair it with a better handling on the front — maybe also a dynamic component on the front fetching from the API — but that's a whole different set of tradeoffs.

[epiqueras]

Yeah