Add themes and fbdev force-refresh quirk via config

CHANGELOG.md

buffyboard/README.md

buffyboard/buffyboard.conf

buffyboard/buffyboard.h

buffyboard/command_line.c

buffyboard/command_line.h

buffyboard/config.c

buffyboard/config.h

buffyboard/font_32.c

buffyboard/lv_conf.h

buffyboard/main.c

buffyboard/meson.build

buffyboard/regenerate-fonts.sh

buffyboard/sq2lv_layouts.c

buffyboard/sq2lv_layouts.h

shared/theme.c

shared/theme.h

shared/themes.c

shared/themes.h

squeek2lvgl/sq2lv.h