Chinese Translation for SWAG + Donut Mod

[VolcanoVVV]

Hi nooky,Volcano here
We discussed providing Chinese localization on discord before.
So here we go

Donut_CH_Translation_DefaultPluginVars.cs.txt
Donut_CH_Translation_Plugin.cs.txt
Donut_CH_Translation_PluginGUI.txt

Also, big thanks to you and another person who provided the Korean translation earlier—it made my job a lot easier <3