docs: Improve docs with core-concept and guides

apps/wiki/content/docs/index.mdx

@@ -6,51 +6,51 @@ icon: House
 
 ## What is Plunk?
 
-Plunk is an open-source email platform designed for developers who need a powerful, scalable solution for transactional and marketing emails. Built with modern technologies and designed to handle millions of contacts, Plunk provides everything you need to manage your email communications.
+Plunk is an open-source email platform built on top of AWS SES. It is designed for developers who need a powerful, scalable solution for transactional and marketing emails. Built with modern technologies and designed to handle millions of contacts, Plunk provides everything you need to manage your email communications.
 
 ## Key Features
 
 <Cards>
-  <Card title="Transactional Emails" href="/api-reference/public-api">
+  <Card title="Transactional Emails" href="/concepts/transactional-emails">
     Send transactional emails via API with template support and variable substitution
   </Card>
-  <Card title="Email Campaigns" href="/guides/campaigns">
+  <Card title="Email Campaigns" href="/concepts/campaigns">
     Create and send one-time email broadcasts to your contacts with advanced scheduling
   </Card>
-  <Card title="Marketing Automation" href="/guides/workflows">
+  <Card title="Marketing Automation" href="/concepts/workflows">
     Build automated email sequences with visual workflow builder and conditional logic
   </Card>
-  <Card title="Contact Management" href="/guides/contacts">
+  <Card title="Contact Management" href="/concepts/contacts">
     Manage millions of contacts with custom fields and CSV import capabilities
   </Card>
-  <Card title="Dynamic Segmentation" href="/guides/segments">
+  <Card title="Dynamic Segmentation" href="/concepts/segments">
     Create dynamic audience segments based on contact data and behavior
   </Card>
-  <Card title="Event Tracking" href="/guides/events">
-    Track events and use them to trigger workflows and segment audiences
-  </Card>
-  <Card title="Email Templates" href="/guides/templates">
+  <Card title="Email Templates" href="/concepts/templates">
     Create reusable email templates for transactional and marketing emails
   </Card>
-  <Card title="Analytics" href="/guides/analytics">
-    Track email performance with detailed analytics on opens, clicks, and more
+  <Card title="Event Tracking" href="/guides/tracking">
+    Track events and use them to trigger workflows and segment audiences
+  </Card>
+  <Card title="Billing" href="/concepts/billing">
+    Understand Plunk's billing model and pricing
   </Card>
 </Cards>
 
 ## Quick Links
 
 <Cards>
-  <Card title="Get Started" href="/getting-started/introduction">
-    Learn how to set up Plunk and send your first email
-  </Card>
   <Card title="API Reference" href="/api-reference/overview">
     Explore the complete API documentation
   </Card>
   <Card title="Self-Hosting" href="/self-hosting/introduction">
     Deploy Plunk on your own infrastructure
   </Card>
-  <Card title="Guides" href="/guides/contacts">
-    Step-by-step guides for common use cases
+  <Card title="Domain Verification" href="/guides/verifying-domains">
+    Learn how to verify your domains for sending emails
+  </Card>
+  <Card title="API Keys" href="/guides/api-keys">
+    Manage your API keys and authentication
   </Card>
 </Cards>