Biqu B2 Chimera Adapter

### Biqu B2 Chimera Adapter

Version 1.0 of Biqu B2 Chimera Hotend adapter. This version of Biqu B1 comes with dual extruder on an Y hotend, but it causes many issues, so I designed this adapter to mount a Chimera hotend.

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It does require supports, but shouldn't be hard to print.

Biqu comes with SKR 2.0, and that board does support dual extruder + dualhotend.
It wasn't hard to modify the firmware to add a second hotend.

The mount shouldn't require any extra screws, and it's not prepared for inserts. I did use wood screws to mount it on the plate, I might add holes for nuts on a future version.

The layer fan nozzles are too close to the hotend nozzle, it does require a bit of tinkering to mount it, I do have to fix it and do a curly nozzle to avoid collisions.

Outer 40mm cooler should be positioned so it does take hot air out. There's the original Chimera cooler inside to ventilate the dissipator, the outer one should extract that hea