Add/links and icons

[sweetpea22]

This PR partially closes #68. It also closes #71 and #73.

• Favicon changed
• Links added
• Layout optimized
• Metadata added for SEO

What this PR does not address from issue #68 because we need to wait for enhancements to be designed & copywritten:

• We have a list of ambassadors and what they are, but no info on how to become one
• Adding Web3.js social media buttons/links ( x.com, youtube, .. )
• Adding small section getting latest web3.js X posts and also some latest youtube videos for showing preview in a window on webpage
• feedback form link/button

[cloudflare-workers-and-pages[bot]]

Deploying web3js-landing with    Cloudflare Pages

Latest commit:	ee96fa8
Status:	✅  Deploy successful!
Preview URL:	https://4f119742.web3js-landing.pages.dev
Branch Preview URL:	https://add-links-and-icons.web3js-landing.pages.dev

View logs