This PR adds an official currency to the survival mini-game while also adding support for decimal precision in currency server wide to make way for more complex uses for currency on the server in the future. You can now type /deposit which brings up an inventory where you can deposit gold ingots, gold blocks, emeralds, and/or emerald blocks into your bank account with a set modifier in the config. To top it off you can also withdraw from your virtual bank account and get back gold ingots as hard currency for old fashioned trading. This shouldn't be needed however as /pay is now officially supported on survival as well as /balancetop. If any issues arise from this, please make sure to reference this PR.