Update CommandResponse in Abstractions.proto

The command response type 'Ok' has been altered from string to google.protobuf.Any to allow for more flexible and versatile data handling. A new 'Identifier' message type is also introduced for streamlined identification of messages.

src/Contracts/Abstractions/Abstractions.proto

@@ -5,9 +5,13 @@ package Contracts.Abstractions.Protobuf;
 import "google/protobuf/wrappers.proto";
 import "google/protobuf/any.proto";
 
+message Identifier {
+  string Id = 1;
+}
+
 message CommandResponse{
   oneof OneOf{
-    string Ok = 1;
+    google.protobuf.Any Ok = 1;
     Accepted Accepted = 2;
     NotFound NotFound = 3;
     NoContent NoContent = 4;