Create a Definitions page

[bmann]

Create a field definitions page that explains each field, what it contains, and any usage / consumption details.

This will help in people programmatically consuming the JSON file, since we can’t put comments in JSON.

[pedrouid]

Related to discussion on #32

[pedrouid]

Proposal following the discussion on #32:

• name = name of the chain
• short_name = shortened and lowercase name
• consensus_type = blockchain consensus type
• native_currrency = blockchain native currency symbol
• ecosystem = blockchain ecosystem symbol
• network = name of the network related to cluster
• chain_id = number of the chain id
• network_id = number of the network id
• rpc = array of publicly available remote node rpc endpoints

I've copied the first draft that I commented previously, changed chain field to ecosystem and also added consensus_type and native_currency