feat: Pager component: adding first and last and adding addAttributes

[mndonx]

Summary

This PR improves the Pager component for Compound.

• Adds First and Last option to Pager (this is regularly seen in Drupal sites)
• Adds add_attributes to template (to make it easier to extend them when we implement them in other components)
• Renamed pager-ellipses.yml to pager-next-ellipses.yml to match prev example for consistency
• Hid the ellipses on the basic pager example (it didn't seem to make sense to keep them in without the arrows there too.)

How to review this PR

• Check out feat-pager branch
• npm run develop
• Navigate to: http://localhost:6006/?path=/story/molecules-menus-pager--basic http://localhost:6006/?path=/story/molecules-menus-pager--with-next http://localhost:6006/?path=/story/molecules-menus-pager--with-both http://localhost:6006/?path=/story/molecules-menus-pager--with-previous http://localhost:6006/?path=/story/molecules-menus-pager--with-first-and-last
• Verify that changes above make sense and the code looks good

[mndonx]

@callinmullaney @joetower Thanks! I've moved the aria-label into the pager__attributes.

[mndonx]

@ModulesUnraveled

• [x] Let's use array numbers to get rid of 0s.
• [x] Make the current page more obvious, and add a current to each example.
• [x] Add aria-current="page" to the current link.
• [x] Please check to see what the Drupal text is for "first" and "last"
• [x] You can remove all of the empty attributes from yaml files
• [x] Add role="navigation" to the nav

Also:

• I removed yml references to pager-uuid -- I can't find this anywhere, and not sure why it was there.
• I also stripped down the theming of the next/prev buttons. I feel like the css arrows are more of a design choice, and we're trying to avoid that here.

Let me know what you think! Amanda

[mndonx]

Note to self to adjust item padding at small widths

[github-actions[bot]]

:tada: This PR is included in version 1.12.0 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: