🏠 HOMEPAGE UPDATE: Add Advanced Guide to Main Navigation

HOMEPAGE ENHANCEMENTS:
✅ Added Advanced Guide as third learning path
✅ Updated intro: 'from first conversations to connected AI ecosystems'
✅ Created Advanced Guide card with MCP-powered badge
✅ Updated About section: 'Three complete learning paths'
✅ Added timing estimate: 'Advanced Guide: ~8+ hours'
✅ Added 'Connected AI Systems' quick help link with MCP badge

🎯 COMPLETE TRILOGY SHOWCASED:
- Beginners Guide: Foundation skills
- Intermediate Guide: Advanced partnership
- Advanced Guide: Connected AI ecosystems

Perfect homepage presentation of the full learning journey! 🚀

src/content/docs/index.mdx

@@ -5,9 +5,9 @@ description: A comprehensive guide to AI collaboration skills
 
 import { Card, CardGrid, LinkCard, Aside, Badge, Steps } from '@astrojs/starlight/components';
 
-*A comprehensive guide to AI collaboration skills - from first conversations to advanced techniques*
+*A comprehensive guide to AI collaboration skills - from first conversations to connected AI ecosystems*
 
-## Two Complete Learning Paths
+## Three Complete Learning Paths
 
 <CardGrid>
 <Card title="🎓 Beginners Guide" icon="rocket">
@@ -37,6 +37,20 @@ import { Card, CardGrid, LinkCard, Aside, Badge, Steps } from '@astrojs/starligh
   href="/intermediate/tutorials/multi-session-projects/"
 />
 </Card>
+
+<Card title="🏗️ Advanced Guide" icon="rocket">
+**Connected AI Ecosystems** - MCP-powered systems that transform organizations
+
+**Perfect for:** Professional AI integration, organizational transformation, cutting-edge AI capabilities
+
+**What you'll master:** Connected AI workflows, multi-AI orchestration, enterprise integration, AI ecosystem architecture
+
+<LinkCard
+  title="Build Connected AI Systems"
+  description="Start with MCP Foundation Workshop"
+  href="/advanced/tutorials/mcp-foundation-workshop/"
+/>
+</Card>
 </CardGrid>
 
 ---
@@ -101,14 +115,19 @@ Start with [Tutorial 1: From Awkward Small Talk to AI Collaboration](/beginners/
   title="Complex Projects with Claude"
   description="Explore the intermediate guide framework"
   href="/intermediate/tutorials/multi-session-projects/"
-  badge="Coming Soon"
+/>
+<LinkCard
+  title="Connected AI Systems"
+  description="Build AI ecosystems that transform organizations"
+  href="/advanced/"
+  badge="MCP-Powered"
 />
 </CardGrid>
 
 ## About This Approach
 
 <Steps>
-1. **Two complete learning paths** - Start with fundamentals or jump to advanced collaboration
+1. **Three complete learning paths** - From fundamentals to sophisticated AI ecosystems
 2. **Experience-driven learning** - Learn by having actual conversations, not just reading about them  
 3. **Problem-focused** - Addresses real frustrations people have with AI at every level
 4. **Conversational tone** - Written like someone explaining to a friend, not a manual
@@ -117,7 +136,7 @@ Start with [Tutorial 1: From Awkward Small Talk to AI Collaboration](/beginners/
 </Steps>
 
 <Aside type="note">
-**Beginners Guide:** ~4 hours | **Intermediate Guide:** ~6 hours | **Immediate value:** Every single section
+**Beginners Guide:** ~4 hours | **Intermediate Guide:** ~6 hours | **Advanced Guide:** ~8+ hours | **Immediate value:** Every single section
 </Aside>
 
 ---