starport relayer: support any IBC module

[lumtis]

I think we just need to be able to customize the port and the version from the current workflow:

---------------------------------------------
Setting up chains
---------------------------------------------

? Source RPC http://localhost:26657
? Source Faucet (optional)
? Source Port (transfer)
? Source Version (ics20-1)
? Target RPC https://rpc.alpha.starport.network:443
? Target Faucet (optional)
? Target Port (transfer)
? Target Version (ics20-1)

[fadeev]

Maybe we can have an --advanced flag. We'll also need a channel, I believe.

[lumtis]

channel is generated when the connection is made