Clear API definitions between UI and API

[naleeha]

Feature Request

Description of Problem:

Currently the custom RPC call function defined on server is part of the RPC message UI need to send. We need a separation so what UI sends is not tied to internal function names. (also the interface name is used as "service" parameter of the rpc call)

Would be good to have a way to view catalog of possible messages that server and UI can send back and forward. This has been asked by other users of VUU as well

Potential Solutions:

TBC

Also need to provide documentations of all possible RCP messages - been asked by several users

[naleeha]

Might be best to wait for new RPC message type defined as outcome as #1447
Being tackled as part of this change #1434

[naleeha]

First cut implemented for a viewport RPC request and a response that can be success or failure.
New issue created for further follow up #1502