Improve UI for "Not Found" Page

[siddhantdixit]

"Not Found" page needs to be updated with a new UI.

Ideas

• Not Found Image or Icon in between
• LinkStack Logo Branding at Bottom
• Link to LinkStack for new user account creation.

[jsvigneshkanna]

Please assign this issue to my name

[Shubh-Bindal]

pls assign this issue to me

[nishasen]

Hello @siddhantdixit can you please assign me this issue, I would like to design it