Add Stacklok Enterprise CTAs to quickstart guides (#640)

Co-authored-by: Dan Barr <6922515+danbarr@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: danbarr

docs/toolhive/guides-cli/quickstart.mdx

@@ -300,6 +300,16 @@ server. Here are some next steps to explore:
 - Learn how to [upgrade ToolHive](../guides-cli/install.mdx#upgrade-toolhive)
   when new versions are available
 
+:::tip[Using ToolHive with a team?]
+
+ToolHive Community is great for individual use. When your organization needs
+centralized governance, IdP integration (Okta, Entra ID), and hardened
+production-ready MCP servers, that's where Stacklok Enterprise comes in.
+
+[See what's included in Stacklok Enterprise →](../enterprise.mdx)
+
+:::
+
 ## Troubleshooting
 
 <details>

docs/toolhive/guides-k8s/quickstart.mdx

@@ -442,6 +442,17 @@ Here are some next steps to explore:
 - Integrate MCP servers with your existing Kubernetes applications
 - Try deploying other MCP servers from the ToolHive registry
 
+:::tip[Ready to take this to production?]
+
+The Kubernetes operator is available in both ToolHive Community and Stacklok
+Enterprise. Enterprise adds IdP integration (Okta, Entra ID), hardened
+supply-chain-attested images, a Cloud UI for fleet management, and SLA-backed
+support - built for teams taking MCP from proof of concept to production.
+
+[See what's included in Stacklok Enterprise →](../enterprise.mdx)
+
+:::
+
 ## Troubleshooting
 
 <details>

docs/toolhive/guides-ui/quickstart.mdx

@@ -134,6 +134,15 @@ server. Here are some next steps to explore:
   [manually configure clients](../reference/client-compatibility.mdx#manual-configuration)
   that ToolHive doesn't automatically configure
 
+:::tip[Ready to go further?]
+
+Stacklok Enterprise extends ToolHive with centralized management, IdP
+integration, and hardened images for teams deploying MCP at scale.
+
+[Learn about Stacklok Enterprise →](../enterprise.mdx)
+
+:::
+
 ## Troubleshooting
 
 <details>