Add Aspire 13.0 upgrade documentation and remove obsolete 9.5.2 guide (#5518)

* Initial plan

* Add Aspire 13.0 upgrade documentation

Co-authored-by: davidfowl <[email protected]>

* Remove unnecessary zone pivot from CLI update section

Co-authored-by: davidfowl <[email protected]>

* Remove upgrade-to-aspire-9.md and consolidate into aspire-13 doc

Co-authored-by: davidfowl <[email protected]>

* Add note about Visual Studio support for single-file AppHosts

Co-authored-by: davidfowl <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: davidfowl <[email protected]>

Author: Copilot

.openpublishing.redirection.json

@@ -339,6 +339,10 @@
     {
       "source_path_from_root": "/docs/deployment/aspire-deploy/local-deployment-state.md",
       "redirect_url": "/dotnet/aspire/deployment/deployment-state-caching"
+    },
+    {
+      "source_path_from_root": "/docs/get-started/upgrade-to-aspire-9.md",
+      "redirect_url": "/dotnet/aspire/get-started/upgrade-to-aspire-13"
     }
   ]
 }