Adapt `swyxkit` page with Windi CSS

[joaopalmeiro]

References:

• https://github.com/sw-yx/swyxkit
• https://swyxkit.netlify.app/foo
• https://windicss.org/integrations/vite.html
• https://stackoverflow.com/questions/69601626/windi-css-hmr-not-working-for-svelte-vite-app
• https://swyxkit.netlify.app/about

[joaopalmeiro]

https://github.com/sw-yx/swyxkit/blob/main/src/routes/%5Bslug%5D.svelte#L41