Create a community addon for the Svelte CLI

[SeppahBaws]

The Svelte CLI can scaffold projects with a number of integrations, or add new integrations into an existing sveltekit project.
Recently they implemented community addons, allowing anyone to create a plugin without having to merge it in the cli codebase. This could deprecate our existing cli tool, allowing us to rely on some shared functionality exposed from the svelte cli

https://svelte.dev/docs/cli/community