Feature request - Allow engines to customize rake notes

Hello,

Looking at issues like #13004 or #11900, we should definitely provide a way for engines (and therefore applications) to add new extensions and patterns handled by rake notes. I would love to send a patch to add such feature but I would love to have your thoughts about the way the engine could accomplish this.

I’ve write a tiny gist with few proposals. Feel free to propose yours and give your thoughts.

Thank you. Have a nice day.