configs: apple: Enable CMD_SELECT_FONT and FONT_16X32

Apple devices have high DPI displays so the larger fonts are preferable
for improved readability. This does not yet change the used font based
on the display's pixel density so the standard 8x16 font is still used
by default.

Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Janne Grunau <j@jannau.net>