Remaster the nested group

[SettingDust]

Relate:

• [ ] https://github.com/isXander/YetAnotherConfigLib/issues/149
• [ ] https://github.com/isXander/YetAnotherConfigLib/issues/156

There isn't a way to nest group

For now, the nested mods group will add three controllers

1. The rule text as label controller
2. The mod set option as a boolean controller*
3. All the mods in the mod set as booleans controller(var length)

*You shouldn't use mod ID as mod set ID when the mods in the mod set contain the mod itself

The rules group will be

1. The rule text as label controller
2. The rules