Fix windows build issue with import alias

[HiDeoo]

Changes

Initially reported on Discord, this PR fixes a Windows-specific build issue when importing an Astro component with a <script> tag using an import alias.

• Repro (the repro includes MDX, but turns out the issue is not MDX-related)
• The custom resolver used in the vite plugin to alias paths needs to return normalized paths.

Testing

• Added a new component Qux.astro with a <script> tag to the existing alias-tsconfig fixture, imported it using an alias.
  • The associated test fails to build the fixture on Windows before the fix.
  • The build succeeds after the fix.
• Also tested the fix with a local patch on the Starlight repo where the issue was originally reported.
  • The build succeeds on Windows after applying the fix.

Docs

This is a bug fix; no doc updates are needed.

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Latest commit: d63218b

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[github-actions]

⚠️ Package Trust Level Decreased

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Decreased trust levels may indicate a higher risk of supply chain attacks. Please review these changes carefully.

📦 Package	🔒 Before	🔓 After
@cloudflare/unenv-preset	trusted-with-provenance	none
workerd	trusted-with-provenance	none
ts-api-utils	provenance	none
undici	provenance	none
miniflare	trusted-with-provenance	none
youch	provenance	none
@cloudflare/workerd-darwin-64	trusted-with-provenance	none
@cloudflare/workerd-darwin-arm64	trusted-with-provenance	none
@cloudflare/workerd-linux-64	trusted-with-provenance	none
@cloudflare/workerd-linux-arm64	trusted-with-provenance	none
@cloudflare/workerd-windows-64	trusted-with-provenance	none
wrangler	trusted-with-provenance	none

[matthewp]

Simple fix, thank you!