Feature request: Send to REPL/Terminal

### Is this the right repo?

This is specifically a request for VSCode

**Description:**

When working in VSCode with Python, Jupyter, F#, Clojure, I can hit a keyboard combo (usually CMD + Enter on Mac)
and the code is either executed intelligently in a REPL/Notebook tab (like Clojure, Jupyter) or send to a REPL terminal (like Python, F#)

Currently I have a separate terminal tab in VSCode with `iex -S mix` and copy/paste the code to execute

**Proposed solution:**

I would love to have the keyboard combo send my highlighted code to a REPL/Terminal like Python,
where if no REPL terminal is running, it will start one & execute, else it will send the highlighted code (or line if no highlight) to the REPL.

This enables rapid REPL driven development :)

Thank you for considering!