Added zh-tw language and modified the file name

[ShangYi7]

Description

I added Traditional Chinese language so that more people can use it more quickly And change cn.lua to zh-cn.lua

Remove spaces at the end of lines 398 and 400 of server/functions.lua

ChecklistChecklist

• [x] I have personally loaded this code into an updated qbcore project and checked all of its functionality.
• [x] My code fits the style guidelines.
• [x] My PR fits the contribution guidelines.

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