That’s already managed by gradle, so unless you aren’t using gradle in the IDE then it should just work, but if you are then they are some jar in the build directory that gradle creates when you setup* stuff.
Uh, ? is definitely not a number, do you know where that’s coming from?
Fewer than you might think! And for a surprising number of others there are active forks too! The GT New Horizons github has a lot of active forks of various mods, worth checking them first for a lot of things.
Ew? Lol.