Merge branch 'DOC-1867-Document-feature-AI-Gateway-help-cloud-team-polish-clean-up' into adp-pkg1

# Conflicts:
#	modules/ai-agents/pages/mcp/remote/concepts.adoc

Author: paulohtb6

modules/ROOT/nav.adoc

@@ -64,12 +64,16 @@
 *** xref:ai-agents:observability/ingest-custom-traces.adoc[Ingest Traces from Custom Agents]
 ** xref:ai-agents:ai-gateway/index.adoc[AI Gateway]
 *** xref:ai-agents:ai-gateway/what-is-ai-gateway.adoc[Overview]
+*** xref:ai-agents:ai-gateway/gateway-modes.adoc[Gateway Modes]
 *** xref:ai-agents:ai-gateway/gateway-quickstart.adoc[Quickstart]
 *** xref:ai-agents:ai-gateway/gateway-architecture.adoc[Architecture]
 *** For Administrators
 **** xref:ai-agents:ai-gateway/admin/setup-guide.adoc[Setup Guide]
+**** xref:ai-agents:ai-gateway/admin/configure-ai-hub.adoc[Configure AI Hub Gateway]
+**** xref:ai-agents:ai-gateway/admin/eject-to-custom-mode.adoc[Eject to Custom Mode]
 *** For Builders
 **** xref:ai-agents:ai-gateway/builders/discover-gateways.adoc[Discover Gateways]
+**** xref:ai-agents:ai-gateway/builders/use-ai-hub-gateway.adoc[Use AI Hub Gateway]
 **** xref:ai-agents:ai-gateway/builders/connect-your-agent.adoc[Connect Your Agent]
 **** xref:ai-agents:ai-gateway/cel-routing-cookbook.adoc[CEL Routing Patterns]
 **** xref:ai-agents:ai-gateway/mcp-aggregation-guide.adoc[MCP Aggregation]