docs(getting-started): add structured content for new users

- Create a comprehensive guide for evaluating, running, and customizing the Flutter News App Toolkit
- Introduce core philosophy, architecture, local setup, customization, and deployment topics
- Use CardGrid component for structured presentation of getting started steps

Author: fulleni

src/content/docs/getting-started/index.mdx

@@ -0,0 +1,32 @@
+---
+title: 'Getting Started'
+description: A step-by-step guide to evaluating, running, and customizing the Flutter News App Toolkit.
+---
+import { Card, CardGrid } from '@astrojs/starlight/components';
+
+Welcome to the Flutter News App Toolkit! This section provides a recommended path for all new users to ensure a smooth and successful experience.
+
+Whether you are evaluating the toolkit under the free trial license or are ready to build your production application, we suggest following these guides in the order they are presented.
+
+<CardGrid>
+	<Card title="1. Understand the Core Philosophy" icon="open-book">
+		Begin by learning about the production-ready principles that guided the toolkit's construction. This will help you understand the value and quality of the architecture.
+		[Read the Core Philosophy &rarr;](/docs/getting-started/core-philosophy/)
+	</Card>
+	<Card title="2. Understand the Toolkit Architecture" icon="file-tree">
+		Next, get a high-level overview of the multi-repository structure. Understanding how the applications and shared packages work together is essential for effective customization.
+		[Learn about the Architecture &rarr;](/docs/getting-started/toolkit-architecture/)
+	</Card>
+    <Card title="3. Run the Toolkit Locally" icon="laptop">
+		Follow our comprehensive setup guides to get the API Server, Web Dashboard, and Mobile Client running on your local machine.
+		[Go to Local Setup &rarr;](/docs/getting-started/local-setup/)
+	</Card>
+    <Card title="4. Learn to Customize" icon="puzzle">
+        Once you have the toolkit running, you'll want to learn how to modify it. This section covers the critical workflow for taking ownership of shared packages.
+		[View Customization Guides &rarr;](/docs/customization/)
+	</Card>
+    <Card title="5. Deploy to Production" icon="rocket">
+        When you're ready to go live, these guides will walk you through deploying each component of the toolkit to a production environment.
+		[View Deployment Guides &rarr;](/docs/getting-started/deployment/)
+	</Card>
+</CardGrid>