- fixed backtransform not working in most cases
- created one common settings json file
- auto model offset detection
- auto first layer height detection
- auto skirt removal
- exception when using arc moves
- no need to center the model
- normalised cone angle, folder naming and model naming
- omitting start gcode when backtransforming

Tested and working on PrusaSlicer and Cura

also better layer height detection for cura