Uni-19958 Sprint 14 : reliable roundtrip for static_meshes 1

Add FbxEuler::EOrder
Add FbxNode::GetRotationOrder
Add FbxNode::SetRotationOrder

Uni-19957-sprint13_derisk_unknowns

• add automated build of unitypackage

Deploy Ready

Created a unity package that can be shipped alpha customers.

NOTE: the unitypackage was created manually and does not match the github file hierarchy.

small things: use-case tests for everything & blendshape support

Added Use-case unit tests for everything we can export; except lights which has a pending CR
Added FbxBlendShape and supporting methods
Added use-case example to demonstrate exporting blend shapes

Uni-18840-sprint10_roundtrip_node_hierarchy

Test-ready C# FBX SDK that can support the import of a node hierarchy of with theirs names and transforms.

All required classes and minimal but complete methods have unit
tests and performance tests, if required.

Support import axis system compatible w Unity (UpVector = YAxis, FrontVector = ParityOdd, CoordSystem = LeftHanded)

Support import FBX w same unit system (1 unit = 1 meter)

Support round-trip comparison of the exported fbx hierarchy against the imported fbx hierarchy (file-based and deep-copy).