Complete Chinese (zh-CN) translation

[power690]

Hi! I noticed that the Chinese (zh-CN) translation was incomplete — many strings were still in English, which makes the app feel inconsistent for Chinese users.

As a Chinese user, it feels quite uncomfortable to see a mix of Chinese and English in the UI. So I went ahead and completed the translation.

What I did

• Added 166 missing Chinese translations in app/src/main/res/values-zh-rCN/strings.xml that were present in the English values/strings.xml but missing from the Chinese version.
• Created terminal-view/src/main/res/values-zh-rCN/strings.xml — this module had no Chinese translation at all.

Areas covered

• Setup wizard (standard/custom install, mirrors, etc.)
• Device management (hard disk, optical drive, floppy, virtual mouse, etc.)
• VM operations (pause/resume, screenshot, shutdown, exit, etc.)
• System settings (refresh rate, processor, cores/threads, etc.)
• Network & VNC (connect, mute, switch to VNC, etc.)
• Notifications & tips (suggestions, missing packages, blur effect, etc.)
• Error & status messages (insufficient storage, server unavailable, unsupported file format, etc.)

I hope you can merge this so that Chinese users can have a fully localized experience. It really makes a difference!

Thank you for this awesome project!