Sherpa Mini Pico MMU body

I'm in the middle of building a Pico MMU for one of my many printers. I've stumbled on a problem where I wanted to use dragonburner for it's minimal compact size but also wanted to implement pico MMU. For that I needed extruder from a list of compatible ones with couple mods. That's how sherpa was chosen. Modified already modified sherpa body to add 4 way pico mmu hub with even shorter path than templates from pico mmu.