Config overhaul

[Taiterio]

Change the way config options are set and read. Currently, all config options of the enchantments and items are Strings, when they should be the type they were earlier on. That also decreases the amount of effort needed to set the options in the initConfigEntries() part of Enchantments and Items.

Furthermore, creating individual configs for each enchantment and item would drastically increase the ability of the user to alter it.

As a last note, adding some descriptions to the config options seems like a good idea to further push this idea, especially when later incorporating the "/ce menu" config option.