Externalize chai Jest compat wrapper into a separate package, e.g. chai-jest

[brillout]

Clear and concise description of the problem

The Jest compatibility layer on top of chai is super nice.

But it cannot be used independently of Vitest.

Suggested solution

It'd be nice to be able to use it independently of Vitest as an independent package e.g. chai-jest. It adds significant value to justify living in its own package.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[roydukkey]

Feel this might be relevant here too. #2118 (comment)

[sheremet-va]

It's already done as @vitest/expect

[brillout]

Neat 😍.