Hypercube Afterburner adapter intergration remix

Slight modification

Carriage still uses LMUU8 bearings. Like 16 heatset insert for just the carriage (4 for mounting motor plate, 6 for belt retainers, 4 for belt tensioners and 2 for BLtouch mount).

BLtouch mount still uses 10mm m3 standoff for clearance.

I slapped on a mount for the optical endstop to use with the endstop flag on the XY jointer.
Have not tested yet but it should work (probably).

Only motor plate needs support for the endstop mount.