Conformence tests should be well-documented.

[jonathanpberger]

As interchaintest as a library user
I want to be able to discover the conformance package
Because its the standard way to test my ibc integration

Acceptance Criteria

• a link from the interchaintest README
• a .md file w/in docs explaining how to use conformance from the interchaintest binary
• a .md file w/in docs explaining how to use conformance as a library

[jonathanpberger]

Docs should be the "hello world" of how you scaffold tests and could include:

• the convenience method
• how would you run the "learnIBCTest" in the example

[jtieri]

I have just opened a PR that will add a doc to interchaintest explaining how to import into other repos as a library to make use of the conformance testing suite here