Example for interchainjs

[Zetazzz]

• Should we keep this demo seperated from cca, or we merge this into cca?
• If we seperate, what name should we use? is create-interchainjs-app ok?
• Do we provide command line tool like cca did.
• Do we have the same structure as cca at the beginning? Or we only include 1 or 2 simple cases?