feat(Angular): Support for global styles for individual components

[bjornharvold]

Is your feature request related to a problem? Please describe
#14549

Describe the solution you'd like
An easy way to apply global styles to an Angular component library in a mono repo with multiple SPA apps / styles.

Current solution
When testing individual components, we switch between SPA projects by changing defaultProject in angular.json.

Are you able to assist to bring the feature to reality?
No - Have little insight into Angular internals

Additional context
Add any other context or screenshots about the feature request here.

[ThibaudAV]

IMHO this PR close this.

but if you could test it would be perfect 🙏

[shilman]

Boo-yah!! I just released https://github.com/storybookjs/storybook/releases/tag/v6.4.0-rc.9 containing PR #16675 that references this issue. Upgrade today to the @next NPM tag to try it out!

npx sb upgrade --prerelease

Closing this issue. Please re-open if you think there's still more to do.