Fontconfig in scheme

This is just experimental and wrote it for learning purpose or testing because it may be helpful to consider modifying the data structure for the better matching rules in the future.

The code just tries to build the pattern from the configuration as similar as possible, but not trying later process. I mean to match the best font in the system against it, like FcFontMatch() does. so strictly speaking this doesn't work as the language binding in scheme but if anyone wants to try, you could use it perhaps.

The code snippets are available here.

just to share this with you.