Docs' components' styles rewrite to tailwind

[Matgorn]

This PR includes rewrite all Astro and Preact components' styles to tailwind.

This is the first step, next one will include getting rid of global .css styles completely.

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[k1eu]

[k1eu]

nice

[k1eu]

You can squash and merge on this one as a one commit, the other one will be the index.css styles