Integration of BEAMS3D into IMAS

[lazersos]

This issue is to track the implementation of BEAMS3D into IMAS. As a preliminary step we will leverage the existing axisymmetric interface (EQDSK) to build an IMAS interface. Thus provided ITER data we can run a BEAMS3D for ITER. Once the interface is established we'll setup workflows for deposition and orbit following. This matches the conventions used in the ITER H&CD program. Once the VMEC workflow is setup we can look toward extending the interface in that direction.