What

A tooltip is added to show who has renoted a note.

I am not sure if these two additional things should be done:

a separate tooltip component can be created. merit: look cleaner. demerit: causes some duplicated code. Currently, the reaction component is reused with the 🔁 emoji. It looks like this:
add a data field to the api/notes/show endpoint to be able to show when a note was renoted, without an extra API request. see https://github.com/misskey-dev/misskey/issues/4438#issuecomment-961485315 This might even be necessary because the number of renoters is limited to 11 which might not include our own renote. merit: show user if they have shared a note before, prevent accidentall duplicate renote demerit: could cause additional database and server load

Why