Premium Upgrade - Console page (#955)

* premium upgrade page
---------

Co-authored-by: jdv <julien@crowdsec.net>

Author: rr404

crowdsec-docs/sidebarsUnversioned.ts

@@ -427,6 +427,11 @@ const sidebarsUnversionedConfig: SidebarConfig = {
 			label: "🩺 Stack Health",
 			id: "console/stackhealth",
 		},
+		{
+			type: "doc",
+			label: "🏅 Premium Upgrade",
+			id: "console/premium_upgrade",
+		},
 	],
 	remediationSideBar: [
 		{

crowdsec-docs/unversioned/console/premium_upgrade.mdx

@@ -0,0 +1,48 @@
+---
+id: premium_upgrade
+title: Premium Upgrade
+description: Upgrade to CrowdSec Premium for enhanced security and commercial-grade features
+---
+
+import { Badge } from "@site/src/ui/badge";
+
+## Why Upgrade to Premium?
+
+CrowdSec Premium features are designed for users who have **commercial usage** of the Console or organizations that want to **enhance the security posture** of their infrastructure.  
+While our Community Plan provides essential security monitoring capabilities, Premium unlocks advanced features that scale with your business needs and provide business-grade protection.
+
+Premium features bring the following benefits:
+
+- **Scalability**:
+    - Extra centralization and synchronization features
+    - Extended data retention
+    - Automation and API access for large-scale deployments
+- **Advanced Threat Detection & Qualification**:
+    - Attack surge detection
+    - Premium proactive blocking with AI-powered blocklists
+    - Background noise filtering
+
+A features comparison can be found on our [pricing page](https://app.crowdsec.net/pricing).
+
+## Optimal Premium Upgrade Setup
+
+When upgrading to a Premium plan, you may not want to upgrade every single Security Engine you monitor. It is common to have a mix of environments:
+- **Production:** Requires Premium features (longer data retention, heavy API limits, organization-wide blocklists).
+- **Dev / Test / Staging:** Can remain on the Free tier.
+
+Because the Premium Upgrade applies to an entire **Organization**, the optimal strategy is to separate your Security Engines into different contexts before subscribing.
+
+When you first create a Console account, your workspace is your "Personal Account".
+As a Community account, you can create one extra organization for free.  
+
+We recommend the following setup:
+- If you have not already, create a new organization for your **Production** environment.
+- Keep your **Dev / Test / Staging** Security Engines in your **Personal Account**.
+- Move your **Production** Security Engines to the new **Production** organization.
+- Upgrade the **Production** organization to **Premium**.
+
+To split your Security Engines into different organizations, use either:
+- The [Transfer feature](/u/console/security_engines/transfer_engine) from the Security Engine page.
+- Or via `cscli`, re-enroll your Security Engines in the desired organization with the `--overwrite` flag to force moving them to the new organization.
+
+After the transfer, the alerts will reappear in the new organization after a few minutes.