chore: RNTL agent skill

[mdjastrzebski]

Summary

npx skills add https://github.com/callstack/react-native-testing-library --skill react-native-testing

Test plan

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.13%. Comparing base (1dd71d3) to head (8833f25).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1875   +/-   ##
=======================================
  Coverage   98.13%   98.13%           
=======================================
  Files          80       80           
  Lines        1450     1450           
  Branches      379      396   +17     
=======================================
  Hits         1423     1423           
  Misses         26       26           
  Partials        1        1           

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.