fix: allow importing .css and assets inside node_modules

[sheremet-va]

Description

Fixes #3862

New --experimental-vm-threads allows us to process .css files and assets inside Node.js modules without manually inlining them. We can give better performance inside this pool by enabling CSS and asset processing without asking people to manually inline the whole library.

Unfortunately, other pools cannot support this until Node.js loader is standardized (the development is very fast, we can't keep up with the changes to be honest).

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Tests

• Run the tests with pnpm test:ci.

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[dimitur2204]

I am running into that exact problem I believe. Is there something I can do to enable that importing?

The vitest version I have is 1.2.2

[dimitur2204]

I am running into that exact problem I believe. Is there something I can do to enable that importing?

The vitest version I have is 1.2.2

I managed to resolve the problem by including the pool: vmThreads option on the test object. I'm assuming this is the reason this PR was closed in the first place.

[sheremet-va]

It was closed because the actual implementation is in #3880