feat: Add text-status-warning color to Box

[gethinwebster]

Description

Add the new warning color to the Box component, to match with Alert, StatusIndicator etc.

Related links, issue #, if available: AWSUI-21899

How has this been tested?

Added new tests/permutations

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?

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (e223ba2) 93.56% compared to head (b6c6b25) 93.56%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1432   +/-   ##
=======================================
  Coverage   93.56%   93.56%           
=======================================
  Files         631      631           
  Lines       16893    16893           
  Branches     5581     5581           
=======================================
  Hits        15806    15806           
  Misses       1014     1014           
  Partials       73       73           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.