Add Chinese Translation

[EastCation]

Hello, I'm Celestia (aka Starmoe), a full stack developer.

I'm looking for a relatively good graphical QEMU front-end software (of course, I have also done it in C# myself. The link is: https://github.com/NuanRMxi-Lazy-Team/QEMU-Manager), has no intention of saw this project, I'm going to download and use, but it has no simplified Chinese, it makes me angry and sad.
So I added simplified Chinese translations for this project.
It is worth mentioning that the language options for the window components of this software are all hard-coded, which is not a good practice. You may need a language list and "translations[lang]". In short, hard-coding will increase the time developers spend thinking and writing.
I didn't modify it because to prevent some unknown consequences from causing the software to fail to start.
I hope the suggestions I put forward will be helpful to you.

Sincerity
Celestia
MoeRain Software Developments
NRLT
October 28, 2025, 21:22

[Tech-FZ]

Hello, Celestia,

I understand that the hard-coding of the languages is a problem. I have planned to work out an alternative not-so-hard-coded solution in a pre-release, but for now, thank you for putting it into here. I will review the changes.