Character API

[bebraw]

It should be possible to render characters to the cube.

Reference:

• https://github.com/dhepper/font8x8/blob/master/font8x8_basic.h
• https://github.com/elovalo/elovalo/blob/master/src/effects/lib/text.c

[zouppen]

You may want to use the gperf file as the input for your character
rendering. Just convert it to JSON using some macros. It is already almost
associative table:

https://github.com/elovalo/elovalo/blob/master/src/effects/lib/font8x8.gperf