Return tool calls properly in azureChat

Make `azureChat` handle tool calls returned the same way we do in `openAIChat`.

Author: ccreutzi

Diff for: +llms/+internal/callAzureChatAPI.m

@@ -73,8 +73,20 @@
     if isempty(nvp.StreamFun)
         message = response.Body.Data.choices(1).message;
     else
-        message = struct("role", "assistant", ...
-            "content", streamedText);
+        pat = '{"' + wildcardPattern + '":';
+        if contains(streamedText,pat)
+            s = jsondecode(streamedText);
+            if contains(s.function.arguments,pat)
+                prompt = jsondecode(s.function.arguments);
+                s.function.arguments = prompt;
+            end
+            message = struct("role", "assistant", ...
+                 "content",[], ...
+                 "tool_calls",jsondecode(streamedText));
+        else
+            message = struct("role", "assistant", ...
+                "content", streamedText);
+        end
     end
     if isfield(message, "tool_choice")
         text = "";

Diff for: tests/tazureChat.m

@@ -172,10 +172,6 @@ function deploymentNotFound(testCase)
         end
 
         % open TODOs for azureChat
-        function generateWithToolsAndStreamFunc(testCase)
-            testCase.assumeFail("need to make azureChat return tool_call in the same way as openAIChat");
-        end
-
         function warningJSONResponseFormat(testCase)
             testCase.assumeFail("TODO for azureChat");
         end