Added Molex 74320-4004 and Molex 74320-1004 DVI connectors

This MR adds two 3D models for the The Molex 74320-1004 (DVI-I) and Molex 74320-4004 (DVI-D) DVI connectors.

This MR accompanies the footprints in kicad-footprints!3586 (merged)

The FreeCAD source files MR can be found here: kicad-packages3D-source!403 (merged)

The 3D models were created by me from scratch using the datasheets given above, the real connector and my trusty caliper.

Molex 74320-1004

Molex 74320-4004

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• A screenshot of the model(s) aligned with KiCad footprint(s)
• Source files are contributed on the apropriate location
  • Link to the package3d-source pull request or to the script pull request
• Step model submitted in 1:1 scale
• WRL model submitted in 1:2.54 scale
• 3D model alignment checked against KiCad footprint
• WRL model uses correct material properties
• Geometry check performed on the model