Expand Folder entity functionality

📌 Implement Category config entity Active is in!

Re-scoping per #5.

Paving the path for 📌 Display both internal and exposed code components in "Manage library" Active led me to install the test-only module that provides status: true code components. Which in turn surfaced a bug more related to this issue than 📌 Display both internal and exposed code components in "Manage library" Active .

Doing that surfaced an interesting consequence of a loose end from back in January: JsComponent::createConfigEntity() always sets category: @todo, which now results in a "@todo" Folder getting created for Components, whenever a code component changes from status: false to status: true. Updated test expectations: https://git.drupalcode.org/project/experience_builder/-/merge_requests/1...