Implement long versions of ItemStack and FluidTanks

[BlueWeabo]

TODO:

• Implement long versions of FluidTanks and ItemStacks
• Make FluidSlot use of IFluidTanksHandler
• Make sure correct implementation of IItemStackLong was done
• Make sure correct reimplementation for ItemSlot was done to take care with the conversion to IItemStackLong.

[miozune]

Sorry for late review, and thanks for your hard work.

• IMO we can merge ItemStackLongDelegate and ItemStackLong; ItemStack is basically a wrapper for Item, damage, stacksize and NBT with convenient methods, unlike IFluidTank. We can add a constructor for ItemStackLong which takes ItemStack.
• ItemSlotLong extends ItemSlot which implements IVanillaSlot. As far as I can see ItemSlotLong needs to deal with getVanillaSlot, otherwise there would be some problems.
• What is the purpose of style changes like https://github.com/GTNewHorizons/ModularUI2/pull/6/files?w=1#diff-916f50b2466a77c30bc767c1aee5cffa8019917c5f340dd8590a42a809b4657cL111-L112 or https://github.com/GTNewHorizons/ModularUI2/pull/6/files?w=1#diff-7dc67f518e8c28613ec602f30288f01418bf91bb56dc50fd80c46bab69ed9d9aL60 ? Especially https://github.com/GTNewHorizons/ModularUI2/pull/6/files?w=1#diff-b655806b602111761fa0f8efdb868132f586b9c9e7168d30e203daad0fee375aR97 looks to be leftover of regex formatting changes.
• Could you set insert_final_newline in .editorconfig to true and fix line changes? I've synced it with upstream and that setting got changed, but brachy seems to be still inserting new lines after that and I think we can just restore old behavior to please git diff.
• I start thinking that future package could be broken down to respective modules classified by functionality, rather than having backport things in one place. It's not like your fault nor I request you to do it in this PR, but just a reminder.

[miozune]

Nitpicks mostly from Intellij suggestions (this review is not sponsored by Jetbrains 😉)

[miozune]

🚀