GLTF Extension - Vertex and Edges support

[dpasukhi]

Description

The proposed extension focuses on enhancing the Data Exchange and GLTF Export/Import functionality.
These improvements will enable support for:

• TopoDS_Vertex (3D points)
• TopoDS_Edge (lines or polylines with 3D representation)

These entities will be exported into GLTF and GLB file formats and imported back.

Validation Process

The final export results will undergo validation using:

• The glTF Validator tool to ensure compliance with the GLTF standard.
• A glTF Viewer to confirm visual correctness.
• TCL based tests to validate import and export data with references.

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At the moment only mesh is supported (simple triangles)

Use Case

Importing GLTF/GLB files with edges or vertexes.
Can be used as attachments for PMI or supplemental geometry, for example.

Benefits

Ability to read/write Edges and Vertexes.

Additional Context

Specification - https://www.khronos.org/files/gltf20-reference-guide.pdf
https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#reference-mesh-primitive (link to primitives that needs to extend)