feat: add compact variant to pagination

[amanabiy]

Description

Adds a compact Pagination variant via pagesVariant="compact", which shows a single 3 of 12 counter between the arrows instead of numbered page buttons, for space-constrained layouts. The text is localized through i18nStrings.pagesCompactText (receiving { currentPage, pagesCount, openEnd }); openEnd appends a +. pagesVariant defaults to 'normal', so existing usage is unchanged.

Related links, issue #, if available: fUKQXLDPlRFb

How has this been tested?

Unit tests, and visual on test pages, and added to visual regression test as well.

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.63%. Comparing base (b4269b2) to head (0387277).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4696   +/-   ##
=======================================
  Coverage   97.63%   97.63%           
=======================================
  Files         957      957           
  Lines       31100    31114   +14     
  Branches    11435    11443    +8     
=======================================
+ Hits        30364    30378   +14     
  Misses        729      729           
  Partials        7        7           

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[avinashbot]

There's a TestI18nProvider helper specifically for testing the logic independent of the strings themselves (src/i18n/testing.tsx)

[amanabiy]

Thanks, used the TestI18nProvider

[avinashbot]

Not sure why these tags (inside the I18nStrings interface) were here before, they technically do nothing here (except confuse people using IDE suggestions).

[amanabiy]

I have cleaned it up. I have removed the other comments as well.