BLTouch Mount Seckit SK-Go

Various BLTouch mounts for Seckit SK-GO.

This thing contains 3 types of mount for BLTouch:
1. BlTouch_back_mount.stl - This is a universal mount which works with both standard cooling duct as well as with [AF-1 Cooling duct](https://www.thingiverse.com/thing:4059487). I am getting good results with this one. The probe Y offset will be very minimal and Y offset will be close to 60 mm

2. BLTouch_side_mount.stl - This one only works for standard cooling duct, It has some shield for heat protection as it is very close to heater block and nozzle. Tested it, not heat issues.

3. AF_Bltouch_side_mount.stl - This one is side mount for [AF-1 Cooling duct](https://www.thingiverse.com/thing:4059487).