Sapphire PRO swappable head

Update 07.04.2023
- New way of the head mount. Only one screw needed to be unscrewed to remove the head by sliding it to the side. I didn't tried this solution on the printer yet since my previous solution works fine and I don't need to swap the head.
All files added, see "Head parts" folder.
- While fast printing I had some issues with the cooling of the hotend which resulted at the under extrusion. Installation of the 4020 fan for the hotend cooling solved the issue. I used the same fan for the part cooling, since I found 5015 fan a bit overkill.
So, fan duct and fan mount for the double 4020 fans added. See "Double 4020 fans" folder.
- Fan duct for the 3010 (default) fan improved to ensure better airflow to the hotend. Fan duct for the 5015 fan improved as well. See "3010 and 5015 fans" folder. I didn't tested this solution.
- Parts for Sapphire Plus printer added except the part for the Z endstop. Since I don't have PLUS printer I'm not sure about this feature. You can still