Reconnect to a new nRepl

[phreed]

Sometimes it is necessary to restart the nrepl.
It would be convenient to drop the current connection and reconnect.
Presently, it seems like a VSCode "Reload Window" does the trick.
If that is the best approach then an update to the documentation would be nice.

[avli]

This is related to #37.

[fasfsfgs]

With #40, you can now disconnect and connect again to a running nREPL. Not sure if it's good enough.

We can:

• Leave it like it is and when someone wants to reconnect, they disconnect first and connect again;
• Expose a new Clojure: Reconnect to nREPL command. It will disconnect from a running nREPL and ask for parameters again;
• Add new logic to the existing Clojure: Connect to a running nREPL command and if the user is already connected to a nREPL, it will ask if they want to reconnect.

@phreed @avli I'm not sure what is the best option here. Is there anything else we could do?