[FEA] Add Numba's GDB pretty-printer to the Numba CUDA repository

[mmason-nvidia]

GDB and CUDA-GDB have the concept of a "pretty-printer" which allows for type-specific formatting tasks while debugging. Numba uses this feature to provide more human-readable output when printing the values of arrays or other types. However, the Numba pretty printer does not include any CUDA-specific handling or support.

To create a starting point for such enhancements the unmodified Numba pretty-printer should be submitted to the Numba CUDA repository. CUDA specific enhancements can then be added in later PRs / merge requests.