(graphics): improve Qt3D mesh visualization service with QUAD primitives support
Description
Implement support for QUAD meshes in Qt3D mesh visualization service.
- Implement ::fwRenderQt3D::ComputeMaterial class handling shader program and render technique used with a compute shader to convert a QUAD mesh to a TRIANGLE one
- Modify ::fwRenderQt3D::FrameGraph class to improve modularity of the scene's framegraph
- Implement mesh conversion in ::fwRenderQt3D::Mesh class using results from tasks above