Introduce Golang examples

[vijaiaeroastro]

This PR introduces 7 golang examples (same as Python examples)

• 3mf_convert.go
• add_triangle.go
• beam_lattice.go
• color_cube.go
• create_components.go
• create_cube.go
• extract_info.go

It currently imports the lib3mf library from https://github.com/3MFConsortium/lib3mf.go
Once ACT is patched / a decision is made on patching the bindings in the repo, examples can be adapted to work with local binding files

This PR also tests the create_cube.go script in Windows, Linux and OSX as a part of the deploy stage.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.09%. Comparing base (932f2d6) to head (c12fa20).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #390   +/-   ##
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  Coverage    66.09%   66.09%           
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  Files          395      395           
  Lines        44642    44642           
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  Hits         29506    29506           
  Misses       15136    15136           

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