Added Swift Package Manager Support

[xquezme]

Swift Package Manager Support

Adds first-class SPM support, including source reorganization, a module map, opt-in traits for optional integrations, smoke tests, and CI coverage.

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Package manifest (Package.swift)

• Exposes AsyncDisplayKit as a static library product
• Targets iOS 14+ and tvOS 14+
• Requires Swift tools version 6.1+ (needed for trait support)
• PINRemoteImage is bundled as the default image downloader — no extra setup needed
• Two opt-in traits for optional integrations (off by default, see below)

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Traits

Traits are disabled by default. Only the dependencies you explicitly enable are resolved.

Trait	Pulls in	Compiler flags set
IGListKit	IGListKit + IGListDiffKit	AS_IG_LIST_KIT, AS_IG_LIST_DIFF_KIT
Yoga	Yoga layout engine	YOGA

.package(
    url: "https://github.com/texturegroup/texture.git",
    from: "3.0.0",
    traits: ["IGListKit", "Yoga"]  // omit either or both
)

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Source reorganization

All sources moved from Source/ → Source/Texture/, with public headers consolidated under Source/Texture/include/ to satisfy SPM's publicHeadersPath requirement. A module.modulemap was added to correctly expose the AsyncDisplayKit umbrella module with explicit submodules for ASControlNode+Subclasses and ASDisplayNode+Subclasses.

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Smoke tests (smoke-tests/)

Three minimal test targets that validate SPM resolution and compilation end-to-end:

• SwiftPackageManagerIntegration — baseline check: imports AsyncDisplayKit, creates an ASDKViewController<ASTextNode>
• IGListKitIntegration — validates the IGListKit trait: implements a ListSectionController using ASSectionController and ASIGListSectionControllerMethods
• YogaIntegration — validates the Yoga trait: exercises Yoga-specific layout API (flexGrow, flexShrink, alignSelf) that is only available when YOGA=1

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CI

Added a spm-smoke-tests matrix job to .github/workflows/ci.yml that builds all three smoke test targets on every PR.

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Other

• Texture.podspec — updated source file globs and header paths to match the new Source/Texture/ layout
• README.md — added SPM installation section and badge
• build.sh — updated to support the new spm-smoke-tests build mode

[CLAassistant]

All committers have signed the CLA.