As discussed in https://github.com/libratbag/piper/issues/48
* data/gnome: add GNOME theme requirements * data/logitech-g403.svg: add G403 GNOME SVG * data/logitech-g502.svg: add G502 GNOME SVG * data/logitech-g700.svg: add G700 GNOME SVG * meson: install GNOME SVG files