Modified webpage WinPOS Thermal Printers Test Updates:

(1) Added a verification function to check if the connected device is a WinPOS desktop thermal printer.

(2) Implemented functions allowing users to retrieve USB information, manufacturer name, model name, and printer status.

(3) Added function for Self-test printing, Taiwan invoice printing and Traditional Chinese text input searching for UTF-8 code and BIG5 code, with printing support.