Timezone support

[martijnrusschen]

Fixes #1787

Changes included:

• Documentation: Updated docs/timezone.md (docs/timezone.md) with timezone prop documentation
• Example: Created docs-site/src/examples/ts/timezone.tsx (docs-site/src/examples/ts/timezone.tsx) showing timezone usage
• Tests: Added src/test/timezone_test.test.tsx (src/test/timezone_test.test.tsx)
• Dependencies: Added date-fns-tz as dev dependency for testing

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.23%. Comparing base (949cd8e) to head (530947c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6068      +/-   ##
==========================================
+ Coverage   99.13%   99.23%   +0.09%     
==========================================
  Files          30       30              
  Lines        3594     3652      +58     
  Branches     1521     1553      +32     
==========================================
+ Hits         3563     3624      +61     
+ Misses         29       27       -2     
+ Partials        2        1       -1     

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