Use global Vitest installation if no local installation is detected

[trymeouteh]

Clear and concise description of the problem

Vitest extension will only work if Vitest is installed in the local directory node_modules folder.

Suggested solution

Please have the extension check if Vitest was installed globally and if so use that installation of Vitest if there is no local installation of Vitest.

Alternative

None

Additional context

No response

Validations

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