Remove AI API reference and update Neo API aliases. (#16628)

* Remove AI API reference and update Neo API aliases.

* Update root

Author: komalali

content/docs/reference/cloud-rest-api/_index.md

@@ -34,12 +34,12 @@ The Pulumi Cloud REST API is organized into the following resource categories:
 
 - [API Basics](/docs/reference/cloud-rest-api/api-basics/) - Endpoint URL, authentication, and required headers
 - [Audit Logs](/docs/reference/cloud-rest-api/audit-logs/) - Access audit log data
-- [AI](/docs/reference/cloud-rest-api/ai/) - Access AI-powered infrastructure assistance
 - [Data Export](/docs/reference/cloud-rest-api/data-export/) - Export data from Pulumi Cloud
 - [Deployment Runners](/docs/reference/cloud-rest-api/deployment-runners/) - Manage deployment runners
 - [Deployments](/docs/reference/cloud-rest-api/deployments/) - Configure and manage Pulumi Deployments
 - [Environments](/docs/reference/cloud-rest-api/environments/) - Manage deployment environments
 - [Insights Accounts](/docs/reference/cloud-rest-api/insight-accounts/) - Work with Insights accounts
+- [Neo](/docs/reference/cloud-rest-api/neo/) - Interact with Pulumi's Agentic AI assistant, Neo
 - [OAuth Token Exchange](/docs/reference/cloud-rest-api/oauth-token-exchange/) - Exchange OAuth tokens
 - [OIDC Issuers](/docs/reference/cloud-rest-api/oidc-issuers/) - Configure OIDC authentication
 - [Organizations](/docs/reference/cloud-rest-api/organizations/) - Manage organization settings and members

content/docs/reference/cloud-rest-api/ai/_index.md

@@ -9,6 +9,10 @@ menu:
 aliases:
   - /docs/reference/cloud-rest-api/neo/
   - /docs/pulumi-cloud/reference/neo/
+  - /docs/reference/cloud-rest-api/copilot/
+  - /docs/ai/copilot/api/
+  - /docs/pulumi-cloud/reference/copilot/
+  - /docs/reference/cloud-rest-api/ai/
 ---
 
 The Agent Tasks API allows you to create and manage AI agent tasks in Pulumi Cloud. These endpoints enable you to create tasks, monitor their status, respond to agent requests, and retrieve task events.