Docs - Global setup

[howlettt]

The global setup Vitest example seems to be messed up. The setup.js file contents seems to be for a globalSetup file but it's passed as setupFiles in vite.config.js.

Possible fixes:

• Pass setup.js as globalSetup instead
  • Problem: globalThis then doesn't work in tests since they have different global scopes
• Change setup.js to work as a setupFiles
  • Problem: setupFiles are run before each test file
• Pass data from globalSetup using project.provide docs
  • Problem: only serializable data can be passed

[cristianrgreco]

@howlettt thanks for raising. I've raised a PR for option 3, lemme know what you think.