Modernize Multiprecision's Visualizers in VS #720
Description
The purpose of this issue is to track attempted modernization of Multiprecision's Visualizers in VS. The visualizer development in MSVC has been modernized by the supplier. It seems to use managed C#. It should be feasible to start with cpp_dec_float and glue-code for C#, although the template parameters might be a bit tricky to work out. If this works out, we can try cpp_bin_float.
I can take a try at this one myself.
See also #716
Cc: @jzmaddock and @LegalizeAdulthood