docs: update homepage content and links

- Update title to "Welcome"
- Change action button text and link to "Get Started: Local Setup" and /getting-started/
- Update "See Deployment Guides" link to /deployment-guides/
- Update hero actions and main buttons to reflect new links

Author: fulleni

src/content/docs/index.mdx

@@ -1,14 +1,14 @@
 ---
-title: 'Introduction: The Flutter News App Toolkit'
+title: 'Welcome'
 description: A complete, production-ready toolkit for building a cross-platform news application.
 template: splash
 hero:
   tagline: Your full-stack solution for launching a professional news platform. Includes a Flutter mobile app, a web-based dashboard, and a powerful Dart Frog backend.
   image:
     file: ../../assets/houston.webp
   actions:
-    - text: Start Local Setup
-      link: /introduction/
+    - text: 'Get Started: Local Setup'
+      link: /getting-started/
       icon: right-arrow
     - text: View on GitHub
       link: https://github.com/flutter-news-app-full-source-code
@@ -51,10 +51,10 @@ This toolkit is built on a foundation of clean architecture and modern best prac
 Ready to get started? Our local setup guides will walk you through running the entire ecosystem on your machine.
 
 <div style={{ display: 'flex', gap: '1rem', marginTop: '1.5rem' }}>
-  <LinkButton href="/introduction/">
+  <LinkButton href="/getting-started/">
     Begin Local Setup
   </LinkButton>
-  <LinkButton href="/api-server/deployment/" variant="secondary">
+  <LinkButton href="/deployment-guides/" variant="secondary">
     See Deployment Guides
   </LinkButton>
 </div>