Run AREPL on command line (outside of VS-Code)

**Is your feature request related to a problem? Please describe.**
I love AREPL so much! It would be great to run it without VS-Code.

Bash example:
```
$ arepl my_file.py
```
Then in terminal you see output of my_file.py automatically update everytime my_file.py changes.

**Additional context**
I use VS-Code to edit remote files over SSH. However, those files are mounted into Docker and I run my code in Docker with a different python version setup. I can't use VS-Code's python, I need to use python inside of my remote Docker container. So I'd like to skip VS-Code and instead use bash in my Docker container, I'd like to run `arepl my_file.py`.

Thanks for this great project!