Major refactor for efficiency/maintainability, more weapons, more effects

So, I've taken a deep look at the module, and have done some extensive refactoring in my own branch. I'm using it for my own campaign. Added more weapons, and streamlined a lot of things for efficiency and maintainability. If you're interested, take a look: https://gitlab.com/nefarrio/deadlands-gun-enchantments . The changelog and readme files are updated to describe my changes.

If you think what I've done is useful, feel free to take whatever you like from it. If you want to discuss, you can drop me a DM on discord.

PS: I'm pretty sure my Spanish file is going to need some scrubbing, but I did my best with it.