Glass Config API

An API heavily inspired by [Cloth Config](https://modrinth.com/mod/cloth-config) for beta 1.7.3, which makes it extremely easy to add configuration to your mod. For players, this adds an autogenerated config screen to [ModMenu Beta](https://modrinth.com/mod/modmenu-beta) for easy editing of config files. This won't do anything without any mods that use this. This has a relatively flexible API which can be used to add custom configuration screens, values, and save/load logic. There's also built-in support for multiplayer syncing, hot-reloading of configs, and descriptions, which are saved inside the JSON file.