[ez] Rename aiconfig stream response to aiconfig_chunk response

I was having some trouble converting everything to `STREAM_AICONFIG_CHUNK` so I'm just doing really easy steps to keep diffs easy to review and test. You'll be able to see final result at end of diff stack

## This diff
Just doing very simple name coy and replace, no functional changes

python/src/aiconfig/editor/client/src/LocalEditor.tsx

@@ -98,8 +98,8 @@ export default function Editor() {
           output_chunk: (data) => {
             onStream({ type: "output_chunk", data: data as Output });
           },
-          aiconfig: (data) => {
-            onStream({ type: "aiconfig", data: data as AIConfig });
+          aiconfig_chunk: (data) => {
+            onStream({ type: "aiconfig_chunk", data: data as AIConfig });
           },
           stop_streaming: (_data) => {
             onStream({ type: "stop_streaming", data: null });

python/src/aiconfig/editor/client/src/components/AIConfigEditor.tsx

@@ -69,7 +69,7 @@ export type RunPromptStreamEvent =
       data: Output;
     }
   | {
-      type: "aiconfig";
+      type: "aiconfig_chunk";
       data: AIConfig;
     }
   | {
@@ -636,7 +636,7 @@ export default function EditorContainer({
                 id: promptId,
                 output: event.data,
               });
-            } else if (event.type === "aiconfig") {
+            } else if (event.type === "aiconfig_chunk") {
               // Next PR: Change this to aiconfig_stream to make it more obvious
               // and make STREAM_AICONFIG it's own event so we don't need to pass
               // the `isRunning` state to set. See Ryan's comments about this in

python/src/aiconfig/editor/server/server.py

@@ -348,7 +348,7 @@ def kill_thread(thread_id: int | None):
 
             aiconfig_json = aiconfig.model_dump(exclude=EXCLUDE_OPTIONS) if aiconfig is not None else None
             yield "["
-            yield json.dumps({"aiconfig": aiconfig_json})
+            yield json.dumps({"aiconfig_chunk": aiconfig_json})
             yield "]"
 
         yield "["