🎩 What? Why?

As described at #8153, it was possible before to define admin stylesheet imports from the components.

After the webpacker migration this is no longer possible.

This PR adds this feature back by extending the implementation of #8115. This PR adds stylesheet import "groups" which can be then included separately for the app and admin groups.

📌 Related Issues

• Fixes Webpacker: Dynamic admin stylesheet definition #8153

Testing

Define a component with an admin stylesheet:

Decidim.register_component(:foo) do |component|
  component.admin_stylesheet = "decidim/foo/admin"
end

Expect to see a difference in the admin styles. You won't see after the webpacker migration.

Note that the method above will not work after this is merged either, but this adds an alternative way to get the same functionality back with Webpacker.

Same with webpacker would be (after this PR):

# Inside decidim-foo module
# config/assets.rb
Decidim::Webpacker.register_stylesheet_import("stylesheets/decidim/foo/admin", group: :admin)

📋 Checklist

• ❓ CONSIDER adding a unit test if your PR resolves an issue.
• ✔️ DO check open PR's to avoid duplicates.
• ✔️ DO keep pull requests small so they can be easily reviewed.
• ✔️ DO build locally before pushing.
• ✔️ DO make sure tests pass.
• ✔️ DO make sure any new changes are documented in docs/.
• ✔️ DO add and modify seeds if necessary.
• ✔️ DO add CHANGELOG upgrade notes if required.
• ✔️ DO add to GraphQL API if there are new public fields.
• ✔️ DO add link to MetaDecidim if it's a new feature.
• ❌AVOID breaking the continuous integration build.
• ❌AVOID making significant changes to the overall architecture.