chore: reorganize sample files (mykola-digtiar#6)

Reorganizes sample files, in order to make the sample visible on Netlify.

- `index.html` is moved to root directory in order to make the Netlify configuration simpler. It's also more compatible to some builders like Vite (see https://vitejs.dev/guide/#index-html-and-project-root)
- Remove external libraries copied in the repo, use jscolor from CDN

Author: jledentu

sample/index.html index.htmlsample/index.html renamed to index.html

@@ -4,12 +4,12 @@
 	<meta charset="utf-8">
 	<meta http-equiv="X-UA-Compatible" content="IE=Edge">
 	<meta name="viewport" content="width=device-width, initial-scale=1">
-	<link rel="stylesheet" type="text/css" href="./style.css">
-	<link rel="icon" type="image/ico" href="./favicon.ico">
+	<link rel="stylesheet" type="text/css" href="public/style.css">
+	<link rel="icon" type="image/ico" href="public/favicon.ico">
 	<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.8.0/chart.min.js"></script>
-	<script src="../dist/chartjs-plugin-piechart-outlabels.js"></script>
-	<script src="./utils.js"></script>
-	<script src="./jscolor.min.js"></script>
+	<script src="https://cdnjs.cloudflare.com/ajax/libs/jscolor/2.4.8/jscolor.min.js" integrity="sha512-h+lzXFd8nq3eEICmGk1ocuPCWcOEt7/QRNdmd9OuuDSjAHPR5hJNlS5ghlBm7InTc6vMuUKl5HPY5mJFIuKAOw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
+	<script src="dist/chartjs-plugin-piechart-outlabels.js"></script>
+	<script src="public/utils.js"></script>
 	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
 	<title>Pie Chart Outlabels</title>
 </head>