Use pikaday library via CDN or through libraries folder instead of saving JS and CSS files in the modules folder.

Problem/Motivation

Currently, the Pikaday CSS and JS files have been added to the module directly. This isn't a recommended way of accessing 3rd party code.

Steps to reproduce

Check JS and CSS folder of the module.

Proposed resolution

Replace the usage of these files with CDN alternatives.

<script src="https://cdn.jsdelivr.net/npm/pikaday/pikaday.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/pikaday/css/pikaday.css">

Remaining tasks

User interface changes

API changes

Data model changes