chore: use satisfies keyword in jsdocs, in create-svelte default template

[plbstl]

A small change to make the JavaScript and TypeScript demo apps in create-svelte a bit more similar

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Latest commit: b0b2485

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[ghostdevv]

IMO It would probably be best to just remove those comments since it now automatically types things like load functions

[dummdidumm]

We discussed removal previously and decided against it because not all IDEs fully support it and because it's easier for a beginner to understand what the types are

[dummdidumm]

Thank you! Could you add a changeset? Then we're good to merge

[plbstl]

Okay done