Hypercube Evolution - square nut remix and others

WIP

Remix (re-modelled with OpenSCAD) of hypercube parts.
For nuts, usage of square nuts that are injected into parts (need to pause print and put nuts inside).

Additional changes to original thing:
Y_Carriage_xDia8_LM10UU - moved screw mount to be more outside of profile, added second screw for making X movement more stable.
Y_Carriage_Clamp_LM10UU - add hole for X rod - can be used when rod is too long or you want to distance from both sides.
X_Carriage - modified tool mounting, integrated optical endstops holders.
XY_Stepper_Mount - left and right version. With cheap inlet (4.2mm x 5mm external dimensions). Motor mount moved 2mm in Y position to keep distance from the frame.

Source files available on github:
https://github.com/albert2004/hypercube