docs: add Grid Pagination chapter and examples

[bwajtr]

Added a chapter to the Grid documentation about the differences between Infinite Scrolling and Pagination.
Added pros and cons for both.
Also added Pagination implementation example in Flow, Lit and React. At the end the text is not that long, so I've decided to not add a new tab for this topic, but rather place it under Lazy Loading chapter

[github-actions]

AI Language Review

The main change in the document is the addition of a new section on Pagination. The content is well-structured, providing a clear distinction between infinite scrolling and pagination, along with guidance on how to implement manual pagination using Vaadin components. The section includes a concise explanation of the custom pagination implementation, ensuring it aligns with the existing documentation style.

No issues were introduced with this addition, and the document as a whole remains consistent and clear. The new content is precise, informative, and follows the documentation's established guidelines effectively.

[rolfsmeds]

Well written, looks good. The only thing that bothers me a bit is that the full code samples for the solution are very long. Could consider splitting the pagination controls implementation into separate files, but that could also be a later refinement.