docs: redirects for LGP mintlify (#5767)

- Added redirects for all of the LGP docs we're moving to Mintlify
- Exclude files not listed in nav from search
- Update banner

docs/docs/examples/index.md

@@ -9,15 +9,4 @@ The pages in this section provide end-to-end examples for the following topics:
 - [Agent Supervisor](../tutorials/multi_agent/agent_supervisor.md): Build a supervisor agent that can manage a team of agents.
 - [SQL agent](../tutorials/sql/sql-agent.md): Build a SQL agent that can execute SQL queries and return the results.
 - [Prebuilt chat UI](../agents/ui.md): Use a prebuilt chat UI to interact with any LangGraph agent.
-- [Graph runs in LangSmith](../how-tos/run-id-langsmith.md): Use LangSmith to track and analyze graph runs.
-
-## LangGraph Platform
-
-- [Set up custom authentication](../tutorials/auth/getting_started.md): Set up custom authentication for your LangGraph application.
-- [Make conversations private](../tutorials/auth/resource_auth.md): Make conversations private by using resource-based authentication.
-- [Connect an authentication provider](../tutorials/auth/add_auth_server.md): Connect an authentication provider to your LangGraph application.
-- [Rebuild graph at runtime](../cloud/deployment/graph_rebuild.md): Rebuild a graph at runtime.
-- [Use RemoteGraph](../how-tos/use-remote-graph.md): Use RemoteGraph to deploy your LangGraph application to a remote server.
-- [Deploy CrewAI, AutoGen, and other frameworks](../how-tos/autogen-integration.md): Deploy CrewAI, AutoGen, and other frameworks with LangGraph.
-- [Integrate LangGraph into a React app](../cloud/how-tos/use_stream_react.md)
-- [Implement Generative User Interfaces with LangGraph](../cloud/how-tos/generative_ui_react.md)
+- [Graph runs in LangSmith](../how-tos/run-id-langsmith.md): Use LangSmith to track and analyze graph runs.