chore: replace tar-fs with modern-tar

[sacrosanctic]

Closes #

Description

should be a dropin replacement

Checklist

• Update snapshots (if applicable)
• Add a changeset (if applicable)
• Allow maintainers to edit this PR
• I care about what I'm doing, no matter the tool I use (Notepad, Sublime, VSCode, AI...)

[pkg-svelte-dev]

Install the latest version of sv from 7f803fa:

pnpm add https://pkg.svelte.dev/sv/c/7f803fab5b2c1849da0c050aa0b15ff02b921e97

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/cli/pr/1209

Note

This PR is from a fork. A maintainer must approve approve each commit before it can be built and installed.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 7f803fa

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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