feat(vitest): expose jsdom global if jsdom environment is enabled

[sheremet-va]

Description

This PR adds a global jsdom variable that you can use to reconfigure the current environment if you use JSDOM:

jsdom.reconfigure({ url: 'https://examples.new.com' })

This is particularly useful in vmThreads and vmForks pool where you cannot reconfigure the current location by reassigning the variable.

If you need TypeScript to recognize it, add vitest/jsdom to your types in tsconfig.json file:

{
  "compilerOptions": {
    "types": ["vitest/jsdom"]
  }
}

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. If the feature is substantial or introduces breaking changes without a discussion, PR might be closed.
• Ideally, include a test that fails without this PR but passes with it.
• Please, don't make changes to pnpm-lock.yaml unless you introduce a new test example.

Tests

• Run the tests with pnpm test:ci.

Documentation

• If you introduce new functionality, document it. You can run documentation with pnpm run docs command.

Changesets

• Changes in changelog are generated from PR name. Please, make sure that it explains your changes in an understandable manner. Please, prefix changeset messages with feat:, fix:, perf:, docs:, or chore:.

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