(feat) adding a rich assistant protocol

gateway.proto

@@ -211,12 +211,60 @@ message SnapshotLoadResult {
 
 message ChatMessage {
     // The message to create
-    string message = 1;
+    oneof request_type {
+        MessagePayload message = 1;
+        // Cancel the last message sent to openAI, includes the message and tools that were started
+        bool cancel = 2;
+    }
+}
+
+message MessagePayload {
+    // The text to send
+    string text = 1;
+    // this can be expanded to add in attachments, etc
+}
+
+message MessageError {
+    // If an error has occured with openAI
+    string error = 1;
+}
+
+message MessageInfo {
+    // An informational message, eg a cancellation notice
+    string info = 1;
+}
+
+message ToolProperty {
+    // eg "method":"LIST" or "type":"ec2-instance"
+    string key = 1;
+    string value = 2;
+}
+
+message MessageToolStart {
+    // The toolID from openAI
+    string toolCallID = 1;
+    // The tool name, eg query
+    string tool = 2;
+    // array of key value pairs
+    repeated ToolProperty properties = 3;
+
+}
+
+message MessageToolEnd {
+    // The toolID from openAI
+    string toolCallID = 1;
+    // the raw string output passed to openAI
+    string output = 2;
+    // the error message from the tool
+    string error = 3;
 }
 
 message ChatMessageResult {
     oneof response_type {
-        string error = 1;
-        string message = 2;
+        MessagePayload message = 1;
+        string error = 2;
+        string info = 3;
+        MessageToolStart toolStart = 4;
+        MessageToolEnd toolEnd = 5;
     }
 }