Voron Stealthburner LGX Lite Mellow SB2040

As there were no available mods to fit sb2040 with lgx lite I modified the standard stealthburner body and LGX Lite mount to fit together. Inspired by standard Stealthburner https://github.com/VoronDesign/Voron-Stealthburner
and lgx lite mount https://github.com/Ramalama2/Voron-2-Mods/tree/main/SB_LGXlitePCB
files for parts to attach sb2040 to extruder are from zer02pi#7873 from voron discord.

For sb2040 included heatsink I use the bigger version of pcb cover

03.01.2023: added cover with 20x20x6 fan mount
05.01.2023: release of 30x30x10 fan cover that should with with standard rp2040 radiator for testing

11.01.2023: 30x30x10 fan cover with exhaust holes