Improve alignment of text output for CJK languages

[cjee21]

Follow-up of #2201
Resolves MediaArea/MediaInfo#1183

[cjee21]

@JeromeMartinez I left the previous codes there if you want to add an option.

[cjee21]

There might be edge cases when there is a character with more bytes than a wchar.

[JeromeMartinez]

Do I interpret well that you switch from full width to 2 half width spaces?

the impact is what I saw when manually editing, for example with a copy paste on GitHub:

Before:

ＩＤ　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 : 1
形式　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 : HEVC
形式／情報　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 : High Efficiency Video Coding
形式のプロファイル　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 : Main 10@L5.1@Main
ＨＤＲ　形式　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 : Dolby Vision, Version 1.0, Profile 5, dvhe.05.09, BL+RPU, no metadata compression
コーデック　ＩＤ　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 : dvh1

After:

ID                                       : 1
形式                                     : HEVC
形式/情報                                : High Efficiency Video Coding
形式のプロファイル                       : Main 10@L5.1@Main
HDR 形式                                 : Dolby Vision, Version 1.0, Profile 5, dvhe.05.09, BL+RPU, no metadata compression
コーデック ID                            : dvh1

It was aligned, it is no more with this patch.
So I think I prefer to keep the previous behavior by default (but I reduce the count of characters for avoiding huge width) + this patch as an option for who knows what is done (and ready to lose the alignment during a copy/paste).

I understand that it is due to choice of a font in the web browser, but as it is the default font, it is what most users see.

[cjee21]

Do I interpret well

This patch is for optimal display in terminals (default/any font) and also in GUI (with correct monospace font for selected language). Result is as seen at MediaArea/MediaInfo#1183 (comment)

prefer to keep the previous behavior by default ... patch as an option

Up to you and the others. It does not matter much to me as I only use English and only have filenames/tags in CJK languages which isn't affected since those are on the right side of the colons.

What should the option be called and I am not sure how to add an option.