add: create introductory documentation and update homepage link text

Author: mallory-scotton

docs/intro.md

@@ -0,0 +1,39 @@
+# Welcome to Graphical Playground Documentation
+
+Welcome to the official documentation for **Graphical Playground**! This documentation provides comprehensive guides, tutorials, and API references to help you build amazing projects with the Graphical Playground engine.
+
+## Documentation Sections
+
+:::warning
+This documentation is currently in active development, and some sections may be incomplete or missing. We are working hard to fill in all the gaps and provide a complete resource for our users. If you have any questions or need assistance, please reach out to our support team or community forums.
+:::
+
+### Engine Documentation
+
+Learn about the Graphical Playground engine architecture, programming with C++, and core engine concepts.
+
+[Explore Engine Docs →](./engine/intro.md)
+
+### API Reference
+
+Comprehensive API documentation for all engine classes, functions, and modules.
+
+[Explore API Docs →](./api/intro.md)
+
+## Getting Started
+
+New to Graphical Playground? Here are some recommended starting points:
+
+- **Engine Overview**: Learn about the engine architecture and core concepts
+- **C++ Programming Guide**: Best practices for programming with the engine
+- **API Reference**: Detailed documentation of all engine APIs
+
+## Resources
+
+- [GitHub Repository](https://github.com/GraphicalPlayground)
+- [Blog](/blog) - Latest updates and tutorials
+- [Community Support](https://graphical-playground.com/support)
+
+---
+
+**Ready to dive in?** Choose a documentation section above to get started!

src/pages/index.tsx

@@ -19,7 +19,7 @@ function HomepageHeader() {
         <p className='hero__subtitle'>{siteConfig.tagline}</p>
         <div className={styles.buttons}>
           <Link className='button button--secondary button--lg' to='/docs/intro'>
-            Docusaurus Tutorial - 5min ⏱️
+            Get Started →
           </Link>
         </div>
       </div>