move cmd off of grpc

api/src/messages/payload.rs

@@ -1,3 +1,5 @@
+use crate::messages::callback::GenericCallbackError;
+use crate::messages::command::{Command, CommandDefinition, CommandResponse};
 use crate::messages::telemetry_definition::{
     TelemetryDefinitionRequest, TelemetryDefinitionResponse,
 };
@@ -9,9 +11,13 @@ use serde::{Deserialize, Serialize};
 pub enum RequestMessagePayload {
     TelemetryDefinitionRequest(TelemetryDefinitionRequest),
     TelemetryEntry(TelemetryEntry),
+    GenericCallbackError(GenericCallbackError),
+    CommandDefinition(CommandDefinition),
+    CommandResponse(CommandResponse),
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, From, TryInto)]
 pub enum ResponseMessagePayload {
     TelemetryDefinitionResponse(TelemetryDefinitionResponse),
+    Command(Command),
 }