feat: add per-property transition support

[EQuimper]

Summary

• Add per-property transition support to EaseView, allowing different animation configs per animatable property (e.g., spring for opacity, timing for translateX, none for scale)
• Implement TransitionMap type with default fallback and per-property SingleTransition overrides
• Support type: 'none' to immediately snap a property to its target value without animation
• Full native implementation on both iOS (Core Animation) and Android (ObjectAnimator/SpringAnimation)

API Example

<EaseView
  animate={{ opacity: 1, translateX: 100, scale: 1.2 }}
  transition={{
    default: { type: 'spring', damping: 15 },
    opacity: { type: 'timing', duration: 200 },
    scale: { type: 'none' },
  }}
/>

Solution

• src/types.ts — new SingleTransition, TransitionMap, and updated Transition union type
• src/EaseView.tsx — resolve per-property transition maps into flat native props (transitionOpacityType, transitionOpacityDuration, etc.)
• src/EaseViewNativeComponent.ts — codegen props for per-property transition overrides
• ios/EaseView.mm — resolve per-property transition config on the native side, support none type for immediate value application
• android/EaseView.kt + EaseViewManager.kt — per-property transition resolution and none support
• src/__tests__/EaseView.test.tsx — tests for per-property resolution, default fallback, and none behavior
• example/src/App.tsx — demo showcasing per-property transitions
• README.md — documentation for the new API

Test Plan

Per-Property Transitions demo — opacity fades slowly (1.5s easeInOut) while translateX bounces with a spring. The timing difference between properties is clearly visible.

iOS — iPhone 17 Pro (iOS 26.2)

pr4-ios-trimmed.mp4

Android — Android 16 emulator (arm64)

pr4-android-trimmed.mp4

Web — Chrome, 390px viewport

pr4-web-final.mp4