Improve error message

[AndyTitu]

Summary

Shared library that acts as an IPC client only returns return codes instead of error messages. This MR takes those return codes and gives them meaning for the users.

Thought process

Look up what each return code means in the shared library code.

On MacOS:

            Self::InvalidArguments => -1,
            Self::UnexpectedOsError => -2,
            Self::RegistrationError => -3,
            Self::CorruptMessage => -4,
            Self::MessageTooLarge => -5,
            Self::FailedToSend => -6,
            Self::NoReply => -7,
            Self::Internal => -8,

On Linux/Windows:

            Self::InvalidArguments => -1,
            Self::FailedToConnect => -2,
            Self::FailedToSendMessage => -3,
            Self::FailedToReceiveResponse => -4,
            Self::ServerClosedConnection => -5,
            Self::FailedToEncodeMessage => -6,
            Self::FailedToDecodeMessage => -7,

[edif2008]

Is there any way to easily validate this? Like do you have any flows and setups that would trigger these error codes?

[AndyTitu]

Is there any way to easily validate this? Like do you have any flows and setups that would trigger these error codes?

Yes, for example turn the integration setting off from the desktop app and then try to run the SDK with desktop auth method. Or close the desktop app in the middle of the processing.

[edif2008]

Changes look good to me. Thank you for doing this improvement.