Cosmos API integration

We want to have the integration with Cosmos API and ecosystem over the REST API in the same way that we already have for Steemit, Golos and Ethereum.

REST API spec:
https://docs.cosmos.network/
https://cosmos.network/rpc/v0.37.9

Discourse forum:
https://forum.cosmos.network/t/integrating-aigents-with-cosmos-tendermint-and-this-discourse-forum/4233 