[feature] Support selecting for font editing

[successgo]

[love-linger]

There are two reasons that we change the font selector from ComboBox (custom font picker) to TextBox since 8.27:

• The FontManager.Current.SystemFonts returns fonts with localized names, which is not supported by Skia, and currently there's no way to get the original font family name with AvaloniaUI. See #366 and https://github.com/AvaloniaUI/Avalonia/issues/14923#issuecomment-1994490737
• You can use composite font family names, such as Consolas, Microsoft YaHei, to enable font fallback when some character is missing in the first given font.

[successgo]

Good to know that, thanks. We need to know the font name first, but it works in the hack way.