Appropriately handle pagination links

### Description

We should properly define the indexing and follow status of pages after page 1 on archives in order to better preserve crawl budget for our sites.

### Use Case

When a user uses this plugin, the archives should be optimized for crawl budget.

### Acceptance Criteria

- Index page (page 1) should be indexed and followed
- Pages after page 1 should be noindex, follow
- Pagination links for pages after page 20 (need to confirm this number) should have `rel="nofollow"` (this includes the actual number link as well as the "next" link if the next link would link to a page after page 20)
- Also add this logic to robots.txt using a wildcard pattern