Update zh_TW's documentation concentrating on the following aspects:
* The file tree structure changes of the main documentation;
* Some changes and ideas from zh_CN translation;
* Removal for several obsoleted contents within the zh_TW translation
or those which are not exising anymore in the main documentation.
* Replacements for some incorrect words and phrases in traditional
Chinese or those which are odd within their context being hard for
readers to comprehend.
v2:
* Remove the fancy character U+feff (ZERO WIDTH NO-BREAK SPACE) reported by Corbet
in https://lore.kernel.org/lkml/87bkg5dp6x.fsf@xxxxxxxxxxxx/
v1:
https://lore.kernel.org/lkml/20230720132729.1821-1-src.res.211@xxxxxxxxx/