docs: Replace usage of deprecated tools in get started page

[AdiHarif]

Linked Issue

Closes #3161

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• This PR targets the dev branch (NEVER master)
• Documentation reflects all relevant changes
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[endigo9740]

Hi @AdiHarif this is well intentioned, but we're already aware that this would only be a temporary fix as sv is about to move to Tailwind v4 being the default add-on install:

• feat: add tailwindcss 4.0 sveltejs/cli#422

I've talked with Ben McCann (lead of SvelteKIt) and he's suggested the idea of pinning the CLI to a set version to avoid this. However, sv and the v2 CLI install are not 1:1. They Skeleton CLI scaffolded more of your project, such as themes. So we're going to likely update the create-skeleton-app to pin the version of Tailwind rather than trying to transition to sv.

You can see plans for this here:

• The Skeleton v2 CLI is installing Tailwind v4, which is not currently compatible #3166

And it looks like a member of our team has handled this in this pending PR. So we'll test and get this out asap:

• Bugfix: Pin TW version in CSA #3170

I'll go ahead and close your PR as it overlaps with these changes. But I appreciate the contribution all the same!