0.4.1 — narrow Package.swift platforms

Manifest-only patch. Same 0.4.0 binary, tighter Package.swift.

The previous manifest declared tvOS, watchOS, and visionOS support that the binary never had — apps resolving against 0.4.0 from one of those targets would link successfully and then trap at runtime. 0.4.1 removes them so SwiftPM rejects unsupported platforms at resolve time with a clear error.

Changed

• Package.swift platforms narrowed to macOS(.v13) and iOS(.v16).
• Build script default platform list reduced to ios ios-sim macos.

Not changed

• Same KeylightSDK.xcframework as 0.4.0 (binary URL unchanged in the manifest; checksum unchanged).
• No public API change.
• No code change.

Coming back later

tvOS, watchOS, and visionOS support will return once the build matrix is restored.