Add footer and useful links to docs etc

[Yuripetusko]

Is your feature request related to a problem? Please describe.
Add a footer with links to docs and guides on what it is and why it is and how it works

Describe the solution you'd like

• Link to evm.rmrk.app
• Link to relevant learn.singular.app pages
• Link to rmrk-team github org
• Link to RMRK twitter
• A page with Some infographics, gifs, videos etc would help too on how it works

Describe alternatives you've considered

Additional context

[shubhankar-shandilya-india]

Hi @Yuripetusko Could you describe what kind of footer you are looking for?
Is there any design that I should follow, as it will help me solve this issue quickly and without much hassle?