Add support for Cosmos chains/IBC ecosystem

[RafaelAPB]

We may add support for the Cosmos ecosystem on SATP. I will use the term Cosmos loosely, meaning support for chains using the Cosmos SDK that are (possibly) connected via IBC. Adding SATP support for Cosmos chains and applications requires some steps.

1. Create a Cosmos Connector
2. Implement support for that connector within SATP
3. Extend BUNGEE to create views over Cosmos chains
4. Create a SATP burn-mint Cosmos contract
5. Create a Cosmos test ledger (helper + docker) to test the functionality