Create a dir with code examples

[Pomax]

It would be useful to have a set of "recipes" available for folks to consult when they want to use font.js for something, so they can just look up code examples of that thing (or most of that thing).

• gsub lookup type 3 consultation: Access to all GSUB lookup type 3 variants. #102

[RoelN]

I'll extract the code from the Wakamai Fondue engine, once it's all settled. That'd hopefully be helpful!

[RoelN]

I tried to kickstart this with #119. I'll be adding more examples!