Feature Request: Option to change file being streamed

[gadenbuie]

This package is revolutionary, so first: thank you!

It would be great to be able to change the file being streamed mid-flight, for example to switch between R files.

At the most basic level, a way to update s$path manually in the command line would be very cool.

At the galaxy brain level, there could also be an follow_open_file option in serve_file() whereby the server polls for the currently open tab and switches out the file when the leader changes files.

[rundel]

Glad tha package is useful!

This is a great idea and should be relatively easy to implement (famous last words). Once we make the first change the 2nd one should be follow naturally.