Consider to use wmain/-municode when linking MSYS build.

[ni4]

Description

Recently MSYS2 (MinGW?) team introduced changes which would force default system codepage usage for CLI arguments translation, which may be non-utf8. For now this required CI changes ( PR #2286 ), however we may whish to completely move CLI to unicode (see msys2/MINGW-packages#22462 (comment) )

https://sourceforge.net/p/mingw-w64/wiki2/Unicode%20apps/