Create Content Routing section

[salmad3]

Done Criteria

• Initiate content routing overview doc
  • ...
• Initiate KadDHT content routing

Why Important

• Provides material on how content routing works.
• Documents protocol(s) not yet documented.

Notes

• Doc on KadDHT being added here.
• Would follow a structure similar to the other sections, such as:
  • What is Content Routing
  • KadDHT
  • ...

[willscott]

would be great for this section to also include

• delegated content routing interfaces
• IPNI / network indexers