[raster] Make small fonts look good #54
Description
Since this library now has a raster module...
Recent work (mostly #49 and kas-gui/kas#201) has improved legibility of small fonts to the point that 5-6pt fonts are fairly easy to read, but quality is still lacking compared to more mature systems.
Likely this means grid fitting (instructing) glyphs. There doesn't currently appear to be a Rust library available for this.
Another approach would be to use system-native libraries, possibly via crossfont, though this should be optional (allowing pure-Rust usage).