feat(ui): add views for Responses (#2293)

# What does this PR do?
* Add responses list and detail views
* Refactored components to be shared as much as possible between chat
completions and responses

## Test Plan
<img width="2014" alt="image"
src="https://github.com/user-attachments/assets/6dee12ea-8876-4351-a6eb-2338058466ef"
/>
<img width="2021" alt="image"
src="https://github.com/user-attachments/assets/6c7c71b8-25b7-4199-9c57-6960be5580c8"
/>

added tests

llama_stack/ui/components/responses/grouping/grouped-items-display.tsx

@@ -0,0 +1,56 @@
+import { useFunctionCallGrouping } from "../hooks/function-call-grouping";
+import { ItemRenderer } from "../items/item-renderer";
+import { GroupedFunctionCallItemComponent } from "../items/grouped-function-call-item";
+import {
+  isFunctionCallItem,
+  isFunctionCallOutputItem,
+  AnyResponseItem,
+} from "../utils/item-types";
+
+interface GroupedItemsDisplayProps {
+  items: AnyResponseItem[];
+  keyPrefix: string;
+  defaultRole?: string;
+}
+
+export function GroupedItemsDisplay({
+  items,
+  keyPrefix,
+  defaultRole = "unknown",
+}: GroupedItemsDisplayProps) {
+  const groupedItems = useFunctionCallGrouping(items);
+
+  return (
+    <>
+      {groupedItems.map((groupedItem) => {
+        // If this is a function call with an output, render the grouped component
+        if (
+          groupedItem.outputItem &&
+          isFunctionCallItem(groupedItem.item) &&
+          isFunctionCallOutputItem(groupedItem.outputItem)
+        ) {
+          return (
+            <GroupedFunctionCallItemComponent
+              key={`${keyPrefix}-${groupedItem.index}`}
+              functionCall={groupedItem.item}
+              output={groupedItem.outputItem}
+              index={groupedItem.index}
+              keyPrefix={keyPrefix}
+            />
+          );
+        }
+
+        // Otherwise, render the individual item
+        return (
+          <ItemRenderer
+            key={`${keyPrefix}-${groupedItem.index}`}
+            item={groupedItem.item}
+            index={groupedItem.index}
+            keyPrefix={keyPrefix}
+            defaultRole={defaultRole}
+          />
+        );
+      })}
+    </>
+  );
+}