Skills from AvdLee/SwiftUI-Agent-Skill: 2 agent skills

• swiftui-expert-skill — Use when writing, reviewing, or refactoring SwiftUI code for iOS or macOS, including state and `@Observable` data flow, view composition, resizable layouts.
• update-swiftui-apis — Scan Apple's SwiftUI documentation for deprecated APIs and update the SwiftUI Expert Skill with modern replacements.