Add support for applying SSSOM mapping files to update edge subject & object

[kevinschaper]

Add a function that takes an edge dataframe and a SSSOM dataframe, and returns a dataframe with edge subject & object fields rewritten to match the mapping, and the any subject or object that is re-written should be preserved as original_subject or original_object

[kevinschaper]

This is really a guess at initial support, once we have mapping files, we can do another pass, and maybe look at using sssom-py.