Update Text.resolve implementation

[Kyle-Ye]

Summary

• Implement Text.resolve, Text.Resolved, and resolved text append paths for strings, attributed strings, image attachments, named images, and resolvable text segments.
• Complete supporting Text.Style, modifier, foreground style, font, line style, and renderer APIs.
• Add text attachment drawing support, platform shims, DocC documentation, and supporting text utilities.

[augmentcode]

🤖 Augment PR Summary

Summary: This PR substantially completes the Text.resolve pipeline and the supporting renderer/styling infrastructure.
Key Changes:

• Added `Text.Resolved` / `Text.ResolvedString` containers to build resolved strings and attributed strings.
• Implemented append paths for `String`, `NSAttributedString`, image/named-image attachments, and resolvable text segments.
• Completed core `Text.Style` and `Text.Modifier` behavior (fonts, foreground style/color, underline/strikethrough, kerning/tracking, baseline offset, transitions, speech, shadow).
• Added `ResolvedProperties` tracking (features, paragraph caching, custom attachment indices, custom style key-colors).
• Introduced text attachment drawing (`OpenSwiftUITextAttachment`) and a `GraphicsContext.draw(image:in:style:shading:)` shim with SwiftUI test stubs.
• Added/updated platform shims and SPI for `NSParagraphStyle` fields and `NSTextAttachment` accessibility metadata.
• Refactored text utilities (moved attributed-string styling detection, kit attribute keys, update-schedule scaffolding).

Notes: Several resolution components remain stubbed, but the API surface and integration points are now in place.

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[augmentcode]

Review completed. 1 suggestion posted.

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

[augmentcode]

Sources/OpenSwiftUICore/Graphic/GraphicsContext.swift:516: Since Shading is part of an @_silgen_name signature that can call into SwiftUI when OPENSWIFTUI_SWIFTUI_RENDERER is enabled, an empty placeholder type risks an ABI mismatch/undefined behavior at runtime. Consider ensuring this type’s layout matches SwiftUI’s GraphicsContext.Shading (even when you only ever pass nil).

Severity: high

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[codecov]

Codecov Report

❌ Patch coverage is 1.94805% with 604 lines in your changes missing coverage. Please review.
✅ Project coverage is 25.68%. Comparing base (68e9cf6) to head (acdade9).

Files with missing lines	Patch %	Lines
Sources/OpenSwiftUICore/View/Text/Text/Text.swift	1.34%	220 Missing ⚠️
...enSwiftUICore/View/Text/Resolve/ResolvedText.swift	3.94%	219 Missing ⚠️
...OpenSwiftUICore/View/Text/Text/Text+Renderer.swift	0.00%	61 Missing ⚠️
.../Text/AttributedString/Text+AttributedString.swift	0.00%	56 Missing ⚠️
.../Text/Resolve/ResolvableTextSegmentAttribute.swift	0.00%	16 Missing ⚠️
...wiftUICore/View/Text/Text/TextNonDarwinShims.swift	0.00%	16 Missing ⚠️
...ICore/View/Text/Util/ReducedTimelineSchedule.swift	0.00%	10 Missing ⚠️
...rces/OpenSwiftUICore/Graphic/GraphicsContext.swift	0.00%	2 Missing ⚠️
...nSwiftUICore/View/Text/Util/String+Extension.swift	0.00%	2 Missing ⚠️
.../View/InterfaceIdiom/InterfaceIdiomPredicate.swift	0.00%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #940      +/-   ##
==========================================
- Coverage   25.94%   25.68%   -0.27%     
==========================================
  Files         721      722       +1     
  Lines       50700    51190     +490     
==========================================
- Hits        13156    13150       -6     
- Misses      37544    38040     +496     

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