Prototype new surface-based Solid modeller for GPU-navigation

Create a prototype surface modeller which uses a small set of surface primitives and information accumulated on common physical surfaces (portals).

Composed of portable data structures and code that can directly in both the vendor-specific and  vendor-agnostic accelerator programming environments (Kokkos, Alpaka, ... )

Potentially in collaboration with Orange team (part of Celeritas team).

To be used to assess the performance characteristics, as a candidate navigation engine in AdePT (and similar) GPU-based particle transport.