replace demo uuid dep with native method

[vhscom]

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
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• Ideally, include a test that fails without this PR but passes with it.

Backing issue: #4929

Tests

• Run the tests with pnpm test and lint the project with pnpm lint and pnpm check

Ran pnpm lint and pnpm check on create-svelte package. Script test does not exist there. Tested app locally by deleting userid cookie then reloading the page and verifying the cookie was recreated with a new random UUID. I did run the test target for kit but it failed after 374 passed tests with an unrelated error.

Changesets

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[changeset-bot]

🦋 Changeset detected

Latest commit: 9be95c2

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
create-svelte	Patch

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[vhscom]

Closing this pull as it won't deploy as-is to Cloudflare Pages using the Cloudflare adapter. Although Cloudflare Workers support crypto.randomUUID() the Pages build throws a ReferenceError due to the crypto import which is required within SvelteKit hooks file currently as the SvelteKit build occurs in a Node context.