Add functionality to create client applications and contracts

[zekucukkose]

The CLI currently does not provide a command to create client applications or contracts between client applications and apis.

It would be a useful feature if these things could be created using the declarative mode (similar to how plugins etc can be configured from a yaml or json file).

[outofcoffee]

Agreed, @zekucukkose this would be a good feature addition. Would you be in a position to submit a PR for this? Happy to discuss approach/architecture.

[jquantin]

have a look here please : jquantin@7f0a181