Create AlterZhops.py

[GregValiant]

Alter the zhop height in layer ranges in the file. Works with up to 4 extruders.

Description

A post processor, it goes through the gcode and changes the hop height in user specified ranges of layers. If the new hop height is zero then the z-hops are set to the current layer height and so are ignored.

This fixes... OR This improves... -->

Type of change

A new post processor

• [ X] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• [ ] Test A
• [ ] Test B

Test Configuration: Various Cura versions through 5.7alpha

• Operating System: Windows 10 Pro

Checklist:

• [ X] My code follows the style guidelines of this project as described in UltiMaker Meta and Cura QML best practices
• [ X] I have read the Contribution guide
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] I have uploaded any files required to test this change