Improve style handling in angular example in monorepo

[yannbf]

Issue: N/A

What I did

There was a style flicker in the addon interactions stories, this PR is a simple fix to solve that

How to test

• Is this testable with Jest or Chromatic screenshots?
• Does this need a new example in the kitchen sink apps?
• Does this need an update to the documentation?

If your answer is yes to any of these, please make sure to include it in your PR.

[nx-cloud]

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• nx run-many --target=prepare --all --parallel --max-parallel=15 -- --optimized

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[shilman]

Style is messed up across the stories -- don't merge 😉

[yannbf]

@shilman I moved some of the styles from bootstrap to the example and got rid of the bootstrap import. It's just for showcasing the form so it's ok to have the styles like that I'd say

[shilman]

LGTM!