Block Library: Add infinite scroll loading option to core blocks

[gziolo]

What problem does this address?

Many classic themes use the infinite scroll feature, so it would be great to add it for feature parity to core blocks that need pagination, like the Query Loop or Comments.

What is your proposed solution?

We have this unique opportunity to make it accessible for everyone by leveraging the Interactivity API. There is #56987 that explored what is necessary to add the feature to the Query Loop block.

Infinite.scroll.mp4