Create Icons for the extension

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Create icons in different sizes for the extension.

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• Populate icons entry in the manifest file.

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Using an Hourglass icon (https://img.icons8.com/plasticine/100/000000/hourglass.png) from www.icons8.com.

Provide attribution in the Chrome Web Store Extension page.

Permission to use icon with attribution obtained here: https://icons8.com/license#jca2ae9203-5d40-4ecd-a9ef-a4023f70a9bb

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• Provide attribution in the Chrome Web Store Extension page.