Hemera carriage for Hypercube Evolution (BLtouch + part cooling fan)

I remixed dbrandao's extruder carriage to suit my needs. I also created my own fan holder that uses a 40x40mm radial fan and holds a BLtouch. The following things of the source file have been changed:

- Square hole for endstop connector has been increased since my endstop didn't quite fit
- Counterbored holes for screws and nuts have been sunken +1.5mm to allow the use of the mounting screws that came with my Hemera
- Dowel pin and mounting screw hole have a chamfer to make it easier to mount it on the Hypercube's carriage
- Added an option to add strain relief tie-wraps

The probe offset is as follows:
X-3
Y-44
(Z-0,15 but you should verify this yourself)

Also be aware that in X the full 300 can no longer be reached since the Hemera is wider than the X-carriage. I don't mind this but its just an FYI.

Inventor part files included