Publish type definitions

[silverwind]

In flat config format, eslint plugins are imported using import statements should therefor publish type definitions to avoid such typescript errors:

TS7016: Could not find a declaration file for module 'eslint-plugin-vitest-globals'

[FRSgit]

Hey @silverwind - just FYI, there is a package that provides typescript typings: globals-vitest. Feel free to use and provide feedback if you have any!