Stops package from breaking when given absolute path

[ghostdevv]

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I was trying to figure out what's going on here: #3001 and discovered that absolute paths break.

Important: due to a different path issue with svelte2tsx (going to make a pr to fix this) the issue I linked above isn't fixed, if testing this pr disable dts emitting in package options so that the dts generation issue doesn't get in the way

[changeset-bot]

🦋 Changeset detected

Latest commit: 5e44246

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

This PR includes changesets to release 1 package

Name	Type
@sveltejs/kit	Patch

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[ghostdevv]

Unsure why ci is failing, will see if I can figure out if it's related to this pr or not

[bluwy]

CI should be fixed now with #3022 merged. Rebasing this PR should fix it.

[ghostdevv]

Amazing thank you @bluwy