Gem staleness indication

Now that MRuby has been around for a number of years it's a bit tricky to sort through gems to know what's possibly up-to-date and what's likely abandoned and no longer compatible. Is there any interest in adding a bit of metadata to mgems.yml to make it easier to highlight what's likely maintained and what's likely not?

https://fundamental-code.com/mruby-timeline/ is something I put together with a bit of git log parsing. There are plenty of short lived gems from 2016 and earlier which I'd wager likely have some compatibility issues with how MRuby has evolved over the years.

檢視現有的 mgems.yml 中繼資料和連結的 mruby 時間軸，包括其中對 git-log 的解析，以了解有哪些可用的陳舊性訊號。與維護者一起定義中繼資料和呈現需求；當提案就識別並突顯可能正在維護或已遭棄置的 gem 達成一致的範圍時，即表示完成。