Merge language files in multi-pack setup

[HoldYourWaffle]

This mod looks like it's going to make my life a lot easier, thanks for the amazing work!

It'd be great if language files could be merged instead of replaced in a multi-pack setup.
Then I could for example easily combine VanillaTweaks' "Hunger Preview" with some inside-joke item renames.

[OffsetMonkey538]

You can join the discord so it's easier to chat: https://discord.offsetmonkey538.top

But yeah that is a good idea, but that would require:

1. Opening all the packs
2. Going through every file in every pack
3. Checking if that file exists in other packs
4. Loading the json file
5. Merging the files
6. Saving them in the final pack

Which I mighht get around to in the future:tm:, but right now I'm busy with school and am taking a break from modding. Maybe in 6 to 12 months when I'm less busy

[HoldYourWaffle]

Sounds good!
I might be able to take a shot at this earlier, depending on the amount of time I have and how annoying this turns out to be :)