We should take advantage of the peerswaprpc proto file and use the generated stubs for the responses of the cln-plugin.

Part of the response message is changed.

Since short channel id needs to be changed to channel id due to the use of peerswaprpc for serialization.

A short channel id is more intuitive and "human readable".
Added short channel id for rpc, and set the value both short channel id and channel id for cln.