feat: inherit container interaction states to descendants

[han4wluc]

Summary

• add opt-in container hover, click, and right-click inheritance via hover.inheritToChildren, click.inheritToChildren, and rightClick.inheritToChildren
• propagate inherited hover visuals to sprite, text, and slider descendants and inherited pressed/right-pressed visuals to sprite and text descendants without firing child payloads or sounds
• use real container entry/exit detection for inherited hover and add unit, parser, and VT coverage for nested inheritance, update-while-active, empty-area pressing, and slider hover visuals
• bump package version to 1.2.0

Verification

• bun run build
• bun run test -- --pool=threads --maxWorkers=1 --no-file-parallelism
• rtgl vt report --item containerevent/event-hover-inherit.yaml --item containerevent/event-hover-inherit-slider.yaml --item containerevent/event-click-inherit.yaml --item containerevent/event-rightclick-inherit.yaml