Add configuration setting for console width in REPL

[daviwil]

We should have a configuration setting that allows the user to choose their own console width for the REPL experience if they don't like the default value.

[rkeithhill]

BTW output that is generated by the script under execution seems to take advantage of the full width of the debug console. Where I notice output wrapping at 80 chars is when I execute a command from the debug console prompt. Perhaps that would be a more localized fix (and makes this a bit more corner case)?

And I can workaround the issue at the debug console prompt like so:

gci | out-string -width 120

[rjmholt]

Closing this now that we've moved to PSRL