theme: fonts: include new ttf font file
theme: fonts: include new ttf font file

Font-Name: MaterialIcons.ttf
Source: https://github.com/material-icons/material-icons-font/blob/master/font

Signed-off-by: Ralf Zerres <a55c5beace021459791f5070a9a90148cd697b8f@networkx.de>

redox-os/orbtk