Lua plugins rework

[SGauvin]

• Rework folder organization
• Now turbo_audio (the rust code) is in its own folder, alongside the "effects" folder
• The lua effects are in the "effects/lua" folder.
• Rework some cancer that we had
• Add a field in the config file to point to the lua folder
• Add support appending to the package.path (http://www.lua.org/manual/5.1/manual.html#pdf-package.path) variable in lua so that lua effects can require("path.to.lualib") from any desired directory. This means that the lua libraries we provide could live somewhere else than the lua effects seamlessly.
• Sets up the folder organization for putting an "effects/rust" folder where all the other effects will live
  • This is a good thing because LSPs are shitting their pants when you have a rust project inside another rust project
• Format the json settings file
• Use impl AsRef<Path> as parameters instead of &Path because it's better. (https://doc.rust-lang.org/rust-by-example/trait/impl_trait.html)
• Update some crates
• Remove jack option because it adds a dev dependency and I CBA

[SGauvin]

@samichoulo911