The debugger has a very open interface, allows to define aliases or new commands.

The current filename and line number and code are also easily available.

See perldebug and perldebguts

It also supports piping to a "pager" app, which could be less, vi, nano or emacs, etc

So anything the OP was hinting at could be quite easily implemented.

I'm not doing to showcase it tho, because the motivation and requirements are more than fuzzy