added Chart for showing overall time taken

Author: nitin42

src/extension/components/Graphics.js

@@ -0,0 +1,15 @@
+import React from 'react'
+
+export function Graphics(props) {
+  return (
+    <React.Fragment>
+      <p>Overall time taken</p>
+      <canvas id="myChart" width="400" height="300" />
+      <p>
+        {' '}
+        Total time taken combining all the phases -{' '}
+        <strong>{props.totalTime} ms</strong>{' '}
+      </p>
+    </React.Fragment>
+  )
+}