Display erlang terms

[jonasrichard]

When content-type is application/x-erlang-binary, the view raw data downloads the binary form of the term, but it would be nice to display them by formatting with io_lib:format/2 if the object is not too large.

[paultannenbaum]

@jonasrichard thanks for the feedback!

Right now the "view raw data" is completely handled by the front-end, so add this request would require the explorer backend to convert the binary to a string representation before sending it back to the front-end. I will go ahead and create an issue and see if we can get to it in the future.