chore: enable exactOptionalPropertyTypes support

[YevheniiKotyrlo]

Summary

This PR enables TypeScript's exactOptionalPropertyTypes flag in react-native-reanimated and fixes all resulting type errors across 19 files.

exactOptionalPropertyTypes is a strict TypeScript flag (not included in strict: true) that distinguishes between "property is missing" and "property is explicitly undefined". When enabled, prop?: T means the property can be omitted but cannot be set to undefined — the fix is prop?: T | undefined.

This matters for downstream projects that enable this flag — without this change, they get type errors when using reanimated APIs. This is currently blocking react-navigation from enabling the flag.

What changed

Four categories of fixes:

1. Core type declarations (commonTypes.ts, Colors.ts, mappers.ts) — Added | undefined to optional properties in AnimationObject, LayoutAnimation, AnimatedKeyboardOptions, LabColor, RgbColor, etc.

2. Style processing generics (common/style/types.ts, propsBuilder.ts, registry.ts) — Used Exclude<Required<P>[K], undefined> to extract the non-undefined type from optional properties before passing to PropsBuilderPropertyConfig<T>

3. AnimatedComponent class hierarchies (createAnimatedComponent/, css/component/) — Updated class property types and ViewInfo interfaces, added type narrowing in _getViewInfo()

4. Layout animation builders (BaseAnimationBuilder.ts, Keyframe.ts) — Added | undefined to builder class properties (durationV, delayV, callbackV) and KeyframePoint.easing

All changes are type annotations only — zero runtime changes.

Test plan

• yarn workspace react-native-reanimated type:check:src:native — 0 new errors (58 pre-existing TS2307/TS7017 from react-native-worklets module resolution remain unchanged)
• yarn workspace react-native-reanimated type:check:src:web — same as native
• Prettier check on all modified files — pass