fix: simplify prettyUrl

[bluwy]

Description

When debugging locally with pnpm, I often get:

vite:transform 0.88ms npm: .pnpm +19ms

This PR expands it fully to the whole path like:

vite:transform 0.37ms ../../../node_modules/.pnpm/svelte-hmr@0.15.1_svelte@3.56.0/node_modules/svelte-hmr/runtime/svelte-hooks.js?v=d5665ff4 +12ms

since it's nicer to know which file exactly Vite is working on.

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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