[zh_CN] Punctuation

[WenSimEHRP]

@OpenTTD/zh_cn

(Sorry for not using Chinese here - the device I am using doesn't have a Chinese IME!)

Unicode features both full-width and half-width versions for some characters, to name some, the Latin alphabet, =+x:;?/\ marks, currency marks, numbers, and spaces. OpenTTD/OpenTTD#12717 addressed this, but it didn't cover all the cases.

It makes sense for a string to use full-width punctuation when it contains Chinese characters, but what if it doesn't include any Chinese characters?

In the original English text, there are several places where two phrases are separated by a simple space (or two spaces), is it better to replace that space with a full-width ideographic space (U+3000), or to not change it at all?

Another major problem is that at least on the Linux version there still aren't any support for punctuation squeezing. Whilist modern web browsers like Chrome automatically squeezes the pieces, OpenTTD displays them "as is" - it keeps the spaces, which makes cases like ), look strange.

[WenSimEHRP]

https://www.w3.org/TR/clreq/#table_of_punctuation_marks
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