San Diego Public Library is marking its 144th year the same way it’s marked the last several San Diego Comic-Cons, with a commemorative library card designed by a local artist, tying the city’s biggest pop culture weekend to the stacks a few blocks away. This year’s design comes from Keithan Jones, founder of KID Comics and organizer of the annual Black Com!x Day. His card shows a blue-skinned, antennaed family — two kids and an adult, red space boots and all — walking hand-i