feat(event): add styled text responder APIs

[Kyle-Ye]

Summary

• Add StyledTextResponder and install its responder filter for styled text views.
• Track tapped link URLs and open them through the environment action when the gesture ends.
• Add link attribute detection and URL value conversion helpers.

Stack

Depends on #1073

[codecov]

Codecov Report

❌ Patch coverage is 6.76692% with 124 lines in your changes missing coverage. Please review.
✅ Project coverage is 29.82%. Comparing base (d8b0299) to head (b311f5d).

Files with missing lines	Patch %	Lines
...ftUICore/Event/Responder/StyledTextResponder.swift	7.31%	114 Missing ⚠️
...ces/OpenSwiftUICore/View/Text/Text/Text+View.swift	0.00%	10 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##           feature/size_gesture    #1074      +/-   ##
========================================================
+ Coverage                 29.65%   29.82%   +0.16%     
========================================================
  Files                       800      792       -8     
  Lines                     63110    62617     -493     
========================================================
- Hits                      18717    18677      -40     
+ Misses                    44393    43940     -453     

☔ View full report in Codecov by Harness.
📢 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.

[tuist]

🛠️ Tuist Run Report 🛠️

Tests 🧪

Scheme	Status	Cache hit rate	Tests	Skipped	Ran	Commit
OpenSwiftUI	✅	0 %	1197	0	1197	29325832f

Builds 🔨

Scheme	Status	Duration	Commit
OpenSwiftUI	✅	1m 58s	29325832f