Add logger support to library about ts-relayer HOT 3 CLOSED

1. Make some counter proposals to this api design or accept it.
2. Make a draft pr showing how to pass the logger into the system so it is not a pain and gets down to ibcclient
3. After review of above, add logging commands

from ts-relayer.

• log verbose on every signAndBroadcast (saying what message sent)
• log debug on every signAndBroadcast (showing the message body being sent, and gas paid)
• we just throw errors, the caller is responsible for catching them and logging them as errors
• if there is any case that really shouldn't happen, add a warn (i cannot think of one)
• consider adding info/verbose calls for the high level link ones (createNewConnection -> log.info("creating new connection between musselnet-4 and bifrost-2"))

Later we can review these with user feedback. Log all/some queries at debug/verbose level? What to add/remove?

This issue is just to get a good attempt at logging to iterate on

from ts-relayer.

One user is our integration tests. We should be able to turn up log-level to debug and rerun tests and get useful information to start pinpointing the error (and from there maybe more debug statements). We can pass in a mock logger that just goes to console and ignores any level not explicitly enabled.

from ts-relayer.