Add a reference to copy-pasted exercise in \copypaste

[Jimvy]

Syntheses/src/eplexercises.cls

Line 63 in 351291e

{\newcommand{\copypaste}[2]{\begin{solution}\IfLanguageName{english}{See}{Voir} \QAlabel~#2 \IfLanguageName{english}{of }{de l'}APE#1.\end{solution}}}

It would be great if this command (which currently creates a solution environment saying to look at another exercise) inserted a link to this other exercise.
Also, maybe it could also copy-paste the statement, if it is not already present.
And, let's dream even more: we could make it applicable to any Q/A, even in exams, and it would then link to the question in the other exam! (Well, I'm probably dreaming too much.)

But the first two are interesting.