Added new recipe for quick testing setup

[christianp86]

I missed a quick guide to setup everything I need to test sveltekit apps build with typescript. I read all the sources and combined them into this recipe.

[netlify[bot]]

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[christianp86]

Have to check how to fix this.

[benmccann]

closing this as jest is highly discouraged. the SvelteKit project creation wizard will ask you if you'd like to use Vitest