[FEATURE] Add autoStart prop to Marquee component

[SashaYursa]

Changes

Added autoStart prop to control whether the marquee animation starts automatically on mount.

Motivation

On Android, the marquee animation causes jank during React Navigation screen transitions. Setting autoStart={false} allows delaying the animation start until the transition is complete.

Usage

<Marquee autoStart={false} ref={marqueeRef}>
  <Text>Long text here</Text>
</Marquee>

// Start manually after delay
setTimeout(() => marqueeRef.current?.start(), 1000)

Default behavior

autoStart defaults to true, so existing usage is not affected.