docs: annotate response with httpx.Response in browser routing example

Make it explicit that browsers.request returns a familiar httpx.Response
so users can rely on the standard interface.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: 2 people

examples/browser_routing.py

@@ -1,13 +1,15 @@
 """Example: direct-to-VM browser routing for raw HTTP."""
 
+import httpx
+
 from kernel import Kernel
 
 
 def main() -> None:
     client = Kernel()
 
     browser = client.browsers.create()
-    response = client.browsers.request(browser.session_id, "GET", "https://example.com")
+    response: httpx.Response = client.browsers.request(browser.session_id, "GET", "https://example.com")
     print("status", response.status_code)
 
     client.browsers.delete_by_id(browser.session_id)