All features could adopt the same styling as the Null safety feature badge Currently | Proposal --- | --- <img width="222" alt="Screen Shot 2022-05-23 at 11 27 07" src="https://user-images.githubusercontent.com/6655696/169788711-aa7b5b8e-bf2a-4ff8-b8db-bc36e2b93d44.png"> | <img width="188" alt="Screen Shot 2022-05-23 at 11 24 14" src="https://user-images.githubusercontent.com/6655696/169788428-bdac5c2f-f165-4d06-aa35-5eaacff25a87.png"> Related https://github.com/dart-lang/dartdoc/issues/1286
