use generics for the PUS stack

satrs/src/action.rs

@@ -40,3 +40,24 @@ impl TargetedActionRequest {
         }
     }
 }
+
+/// A reply to an action request.
+#[non_exhaustive]
+#[derive(Clone, Eq, PartialEq, Debug)]
+pub enum ActionReply {
+    CompletionFailed(ActionId),
+    StepFailed {
+        id: ActionId,
+        step: u32,
+    },
+    Completed(ActionId),
+    #[cfg(feature = "alloc")]
+    CompletedStringId(alloc::string::String),
+    #[cfg(feature = "alloc")]
+    CompletionFailedStringId(alloc::string::String),
+    #[cfg(feature = "alloc")]
+    StepFailedStringId {
+        id: alloc::string::String,
+        step: u32,
+    },
+}