feat(cli): improve tab and window tree rendering

- Add shared rendering helpers for width-aware tree labels, truncation, and no-wrap Rich text.
- Preserve tab index and group window metadata through the extension and SDK factories.
- Render tab trees in browser/window/index order with grouped tab details and optional shortened URLs.
- Reuse the tab tree labels in window trees to keep output compact and consistent.
- Cover legacy missing-index responses, grouped/collapsed tabs, URL display, and rendering helpers with tests.

browser_cli/sdk/factories.py

@@ -37,6 +37,7 @@ class FactoryMixin:
             title=data.get("title") or "",
             url=data.get("url") or "",
             group_id=data.get("groupId") or None,
+            index=data.get("index", 0) or 0,
             browser=browser_name,
         )
         client = cast(_FactoryClient, self)
@@ -68,6 +69,7 @@ class FactoryMixin:
             color=data.get("color") or "",
             collapsed=data.get("collapsed", False),
             tab_count=data.get("tabCount", 0),
+            window_id=data.get("windowId"),
             browser=browser_name,
         )
         client = cast(_FactoryClient, self)