feat(svelte): use vite spa for dev mode and improve usemachine

[Shyrro]

Add a brief description

Currently, we were able to make Svelte work with SSR thanks to many contributions. However, the "dev" mode of a SvelteKit app doesn't seem to be compatible with the monorepo. SvelteKit is not able to understand some workspace packages. ( The dev mode is the issue, as the "preview" command works perfectly )

Since the SSR issues are solved, let's convert the Svelte examples app to a Vite CSR SPA to be able to move on with Svelte.

Please describe the current behavior that you are modifying

From SvelteKit app to Vite SPA app.

This also improves a little bit the useMachine hook for Svelte to make it start and stop at the right moment, but also unsubscribe from the state machine at the right moment.

💣 Is this a breaking change (Yes/No):

No

📝 Additional Information

Once this is merged we can open the "Try svelte" PR not as Draft anymore.

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Latest commit: 2752109

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