Issue 93 shift ww coordinates

[AlvaroCubi]

Description

The VTK export of a GVR of cartesian coordinates suffered an incorrect translation when the origin was not 0,0,0.

Fixes #93

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature
  • [ ] Non-breaking change which adds functionality
  • [ ] Breaking change fix or feature that would cause existing functionality to not work as expected

Testing

Tested doing a full workflow of creating a GVR from a FMESH file, exporting as VTK and then checking in Paraview that the coordinates were correct.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] General testing
  • [x] New and existing unit tests pass locally with my changes
  • [x] Coverage is >80%

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Files with missing lines	Coverage Δ
src/f4enix/input/ww_gvr/geometry.py	94.78% <100.00%> (-0.09%)	:arrow_down:
src/f4enix/input/ww_gvr/models.py	100.00% <100.00%> (ø)
src/f4enix/input/ww_gvr/utils.py	100.00% <100.00%> (ø)
src/f4enix/input/ww_gvr/ww_parser.py	98.39% <100.00%> (+0.02%)	:arrow_up: