Prismafrost Allay

create a mob that looks like a allay which has the following appearance: 'Make an Allay that looks like a floating piece of stained glass with intricate rainbow segments, glittering reflections, silver leading pattern outlines, and kaleidoscopic wings that change color in the light.' and the following behavior/capabilities: 'Make an Allay that glides through snow and ice at double speed, leaves behind trails of frost for players to pick up as ice blocks, and chills items it carries so they cool players upon return.'