Implement line limit APIs

[Kyle-Ye]

Summary

• implement optional, ranged, and reserved-space lineLimit overloads
• propagate upper and lower line limits through EnvironmentValues
• add DocC documentation and focused unit coverage for modifier layout and environment behavior

This completes the line-limit API surface and lets text layout receive both minimum and maximum line constraints through the environment.

[augmentcode]

🤖 Augment PR Summary

Summary: Completes OpenSwiftUI’s line-limit API surface and propagates both minimum and maximum line constraints through the environment so text layout can honor them.

Changes:

• Added LineLimits.swift with View.lineLimit overloads for optional limits, ranged limits, and the reservesSpace variant.
• Introduced LineLimitModifier as an EnvironmentModifier to write both lineLimit (max) and lowerLineLimit (min).
• Relocated EnvironmentValues.lineLimit/lowerLineLimit from Text+View.swift into the dedicated line-limits file.
• Added focused unit tests covering overload wiring, environment writes, and modifier layout characteristics.

Technical Notes: Ranged and space-reserving APIs now flow min/max constraints via EnvironmentValues for downstream Text/TextField layout behavior.

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[augmentcode]

Review completed. 2 suggestions posted.

Comment augment review to trigger a new review at any time.

[augmentcode]

lineLimit(_ number: Int?) only writes EnvironmentValues.lineLimit; if an ancestor sets lowerLineLimit (via range/reservesSpace overloads), this overload will leave the old minimum in place, which can unexpectedly reserve/require extra lines. Consider ensuring this overload also resets the lower bound when setting/clearing the max.

Severity: medium

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[augmentcode]

This DocC example text references lineLimit(:_), but the actual signature is lineLimit(_:); this looks like a symbol-typo that may break generated linking/searchability.

Severity: low

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 26.78%. Comparing base (21eebc9) to head (9b09035).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #958      +/-   ##
==========================================
+ Coverage   26.72%   26.78%   +0.06%     
==========================================
  Files         731      732       +1     
  Lines       52738    52771      +33     
==========================================
+ Hits        14094    14136      +42     
+ Misses      38644    38635       -9     

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