Improve landing page & Heirarchy

[shanejonas]

It would be great if the very first page quickly showed me:

• What it is (I guess it does that already)
• Benefits over comparable tech or at least comparisons to things we might be familiar with
• The quickest example implementation of a client and server so I know what it looks like
• Links to language-specific docs or guides

MessagePack is a good example for inspiration

Source: https://www.reddit.com/r/javascript/comments/i0zs6c/openrpc_jsonrpc_now_has_an_interface_description/fzv0ci6?utm_source=share&utm_medium=web2x