Make JavaScript components more modular

[sebnitu]

Problem

Current Vrembem JavaScript components are written in a single file. This can make it hard to understand their features, test and keep organized.

Possible Solution

Similar to the recent modular update on scroll-stash, should break up the index file to feature modules with a consistent structure for core and settings modules.

General Structure

Here's a concept for a general component structure:

• core.js - Consists of the core definition of the component and the API that gets exposed for distribution. Every component would attach to it's API settings, init and destroy and check autoInit here.
• settings.js - Contains the default options object.
• <feature>.js - The rest of the module exports would be grouped by feature. For example, if the component has state management, that would be included via a state module defined in src/state.js.

JavaScropt Components

A list of JS components that would need this update:

• Drawer
• Modal
• Checkbox