Ability to run scripts using baapan command

[deepal]

Proposed Feature

e.g. mytest.js

const lodash = require('lodash')
lodash.get({a: {b: 10}}, 'a.b')

Introduce the ability to run baapan command similar to node command in order to run JavaScript.

e.g,

baapan mytest.js

baapan should automatically download any required dependencies and run the script.

Alternative suggestion

This is currently possible by .load repl command as follows:

$ baapan
Creating workspace...
Initializing workspace...
Workspace loaded!
> .load mytest.js
const lodash = require('lodash')
lodash.get({a: {b: 10}}, 'a.b')

Fetching and installing module 'lodash' from npm...
Done!
10
>