DEVPROD-5139: Combine Storybook config

[sophstad]

DEVPROD-5139

Description

• Create reusable Storybook addon package
• Add storybook and snapshots to @evg-ui/lib
• Add root monorepo storybook that combines all 3 storybooks using composition
• Implement Dependabot groups so that related dependencies are updated together
• jackspeak dependency resolution is a workaround for this Storybook bug

Testing

• Add snapshot and storybook Evergreen tasks to @evg-ui/lib

[SupaJoon]

What are some other things that could be exported by the shared addons package in the future? Could it be any tooling that's used between Spruce and Parsley storybook or something more specific?

[SupaJoon]

Can this fontStyles be deleted because of preview-head.ts?

[sophstad]

This GlobalStyles component is only used by the application itself, not Storybook, so removing these fontStyles would remove the font styling from the app.

[SupaJoon]

Is it possible to have 1 globalStyles for spruce and parsley?

[sophstad]

Yes—but I think this is not too pertinent to Storybook actually and can be done as followup work for the shared library. I added a comment to DEVPROD-5148!

[sophstad]

What are some other things that could be exported by the shared addons package in the future? Could it be any tooling that's used between Spruce and Parsley storybook or something more specific?

There is the whole Addon API to leverage, and honestly I think we've barely scratched the surface of what it can do! But also, I think we can export any Storybook-related util functions. (One good candidate is the snapshot script but I think that may be easier once @evg-ui/lib is a little more fleshed out with our test_util functions)