[BUILD] Support dependency hoisting

[mgadewoll]

Summary

This PR enables dependency hoisting on root level via nmHoistingLimits: none in the .yarnrc.yml.
This ensures that the /docusaurus-theme and /website packages resolve shared dependencies properly.

To not break the existing build of the /eui package, this package is excluded from the hoisting by setting "hoistingLimits": "workspaces" in it's package.json which ensures its dependencies are not hoisted beyond its workspace scope.

Note

This update fixes the issue we encountered with Docusaurus ejected components for EUI+ that were relying on a specific context and were incorrectly using a different instance of the expected provider, resulting in errors like: Hook useNavbarMobileSidebar is called outside the <NavbarMobileSidebarProvider>.

QA

• checkout this PR gh pr checkout 7891 and ensure the usual scripts work
  • yarn start
  • yarn storybook
  • yarn build-storybook
  • yarn build-docs
  • yarn build
  • yarn build-pack
  • yarn test-ci
• verify that the EUI docs, Storybook and EUI+ deployments work as expected

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 5ced793

[cee-chen]

LGTM! Thank you for the super thorough PR description - that all makes sense to me and I think the workaround works great!

[tkajtoch]

Tested locally and discussed during our sync today. Works like a charm!