Return a list of available fonts of family FAMILY on FRAME.
If FAMILY is omitted or nil, list all families.
Otherwise, FAMILY must be a string, possibly containing wildcards
`?' and `*'.
If FRAME is omitted or nil, use the selected frame.
Each element of the result is a vector [FAMILY WIDTH POINT-SIZE WEIGHT
SLANT FIXED-P FULL REGISTRY-AND-ENCODING].
FAMILY is the font family name. POINT-SIZE is the size of the
font in 1/10 pt. WIDTH, WEIGHT, and SLANT are symbols describing the
width, weight and slant of the font. These symbols are the same as for
face attributes. FIXED-P is non-nil if the font is fixed-pitch.
FULL is the full name of the font, and REGISTRY-AND-ENCODING is a string
giving the registry and encoding of the font.
The result list is sorted according to the current setting of
the face font sort order.
(fn &optional FAMILY FRAME)