Ray tracing

Adds support for reconfigurable intelligent surfaces (RIS). Exact paths as well as coverage maps can be computed.
New “Tutorial on Reconfigurable Intelligent Surfaces” notebook
New section in the EM Primer on Reconfigurable Intelligent Surfaces

Misc

Fixes scaling of the antenna positions of planar arrays with the frequency (#470, #400)
Fixes support of non-CUDA GPUs in Sionna RT (#464)
Fixes an issue accessing the positions of SceneObjects (#449)
Fixes deprecated matplotlib function used in coverage maps (#444)
Fixes typos in the “5G NR PUSCH Tutorial Notebook”
Fixes a bug in the detection of wedges on CPU (#347, contribution by @AinurZiga)
Fixes crash of mobility notebook in Google Colab (#422)
Updates to the Makefile and Dockerfile (#309)