drop the combined sheet; rename to so101_coffee_subtask and fix the red-cup wording

viz: drop the 12 single-step figures, superseded by the 3-step rows

viz: add steps 10-12 row figure

viz: add steps 7-9 row figure

viz: add steps 4-6 row figure

viz: add steps 1-3 horizontal row figure

Add end-effector trajectory figures