Redesign: More visual content on the landing page

[egekorkan]

Currently, we have some diagrams but it would be nicer to have more visual elements. Some inspirations:

• https://csa-iot.org/
• https://www.w3.org/

In the beginning, at the use cases section we can show a snapshot like https://youtu.be/sVZsLXaJqRw?si=U2lh3s6KINCVQWOp&t=145 where we demonstrate that people are using it already. The goal should be about convincing while providing something more visual.