Try including WordPress packages: Shortcode

[youknowriad]

In this issue, I'm trying to use The @wordpress/shortcode package in WordPress instead of the built-in shortcode.js file.

This is meant to prove how we can include WordPress packages in WordPress Core and ultimately merge Gutenberg into Core.

• Small refactoring to webpack configs to avoid duplication between dev and prod
• Adding wp-polyfill and lodash scripts (new vendors used by Gutenberg scripts)
• I'm including the @wordpress/shortcode package in an enqueue script like that: window.wp.shortcode = require( '@wordpress/shortcode' ); mainly because using the library webpack config to generate the globals is not working reliably because of the other bundled scripts in Core that are not packages (it could be revisited later once we have more packages).
• Unfortunately, the jshint config is a bit outdated and doesn't match what we discussed in #core-js meeting yet, I wasn't able to use const or import in the enqueue script (we should address the jshint => eslint replacement in a separate ticket)

The first bit of JavaScript from Gutenberg is making its way into WordPress :)

[youknowriad]

Oh btw, the memize dependency is temporary and should be removed after this gutenberg PR lands ​https://github.com/WordPress/gutenberg/pull/10140

[youknowriad]

Remove unused function

[SergeyBiryukov]

Didn't mean to edit the description, not sure what happened here :)

[youknowriad]

This served its purpose as a baseline for #45065 which just landed. We can close this ticket now.