[Plan] First-party code component imports

All the issues in the issue summary are done, so marking this RTBC.

There is 🐛 Code editor preview doesn't include CSS for dependencies of dependencies Active still left and possibly other related issues not yet listed here or found?

#5: We merged a simple MR for a stop-gap solution in 🐛 Code editor preview doesn't include CSS for dependencies of dependencies Active , then left the issue open for an improved fix to land later. I'm leaning towards marking this issue as fixed, but I could go both ways. Thoughts, @effulgentsia?

Per #6.