[FEAT]: Improve the overall visual appeal of the landing page

[ankman007]

Issue Description

Right now, the landing page of learn-code-contribute is very generic and does not have any visual gravitas.

How to resolve the issue

• Improve the design with index.html and its referring style and script files by adding high-quality images and graphics that are relevant to your content.
• You should choose a cohesive color scheme and consistent fonts to create a professional look.
• Also, make sure to add whitespace to improve readability and prevent the page from looking cluttered.

[cjstyles6]

@charandeepsinghb assign me to this issue, i'll improve the whole UI