Fix some characters not correctly displaying on Windows

[xaviergodart]

Some combining unicode characters are not displaying correctly under windows, creating gaps in the UI, making it unusable.
This is because the windows console (conhost.exe) doesn't support combining codes.

There's this normalization package that should allow us to fix the problem: golang.org/x/text/unicode/norm

[xaviergodart]

It seems to be a windows terminal problem. Using a combining unicode character always add a whitespace right after it, breaking the whole UI. I'm not exactly sure what's happening, but there are a bunch of issues regarding unicode on the windows terminal repository.

For now, I'll just strip out all combining unicode characters for the windows build.

It's available in v0.2.1.