[Feat]: Refactor events to lowercase

[davidjerleke]

Which variants of Embla Carousel are relevant to this feature request?

• embla-carousel (Core)
• embla-carousel-react
• embla-carousel-vue
• embla-carousel-svelte
• embla-carousel-autoplay
• embla-carousel-auto-scroll
• embla-carousel-solid
• embla-carousel-auto-height
• embla-carousel-class-names
• embla-carousel-fade
• embla-carousel-docs (Documentation)
• embla-carousel-docs (Generator)

Feature description

All events should be refactored to lowercase. For example pointerDown --> pointerdown:

v8

emblaApi.on('pointerDown', () => {})

v9

emblaApi.on('pointerdown', () => {})

Additional Context

• PR: [Feat]: Refactor events to lowercase #1084.

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