feat: add back to up icon

[Zish303]

Fixes #5

I have add an 'Up' icon, which scrolls the page to the top when clicked. The size of the icon is responsive to the device size and the color palette also matches with the color of the website.

[Zish303]

@TheOpenInnovator Please review the changes.

[TheOpenInnovator]

Hey @Zish303 the functionality is pretty good. Please fix the styling according to the styling of the website.

• If required you can use the gradient colors of the Clock section.

• Also do adjust the position of this button. Make it a little bit to the right. Not completely, but currently it's overlapping other elements.So make it small and appropriate size so that it will look good. The ss is atached below

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• Since it is overlapping the green area as shown below, try to put it between the red lines and adjust the size and styling accordingly as mentioned above.

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[Zish303]

@TheOpenInnovator I have updated the styling, and also fixed the position of button so that it would not overlap with other elements. Please let me know, if further changes are required.