Move help-center files to @yoast/help-center package

[LisanneKluitmans]

Summary

We want to have structured packages for all our components. To achieve this, we need to move the help-center files to a new package.

Explanation

These component help-center files need to be moved to the new @yoast/help-center package: javascript/packages/yoast-components/composites/Plugin/HelpCenter/ javascript/packages/yoast-components/composites/HelpCenter/views/

Technical decisions

The version of this new package needs to be 0.1.0

Feedback?

[diedexx]

The help center also depends on two components: helpcenter button and helpcenter icon. Helpcenter button and icon now resides in @yoast/components. These can be moved to the helpcenter package.

@andizer please feel free to fill in any remaining blanks.