fix(docs): remove Create React App section and update Discord link

Author: creativoma

docs/docs/getting-started/ecosystem.mdx

@@ -245,14 +245,6 @@ export default function GamePage() {
 }
 ```
 
-### Create React App
-
-`@pixi/react` works out of the box with Create React App. Just install the dependencies and start building:
-
-```bash
-npm install pixi.js@^8.2.6 @pixi/react
-```
-
 ### Vite
 
 Perfect compatibility with Vite's fast development experience:
@@ -268,7 +260,7 @@ npm install pixi.js@^8.2.6 @pixi/react
 
 - **[GitHub Repository](https://github.com/pixijs/pixi-react)** - Source code, issues, and discussions
 - **[GitHub Discussions](https://github.com/pixijs/pixi-react/discussions)** - Ask questions and share ideas
-- **[PixiJS Discord](https://discord.gg/QrnxmQUPGV)** - Get help from the community
+- **[PixiJS Discord](https://discord.gg/zqbXQAADuM)** - Get help from the community
 - **[Examples](https://github.com/pixijs/pixi-react/tree/main/docs/src/examples)** - Browse code examples
 
 The combination of React's declarative component model with PixiJS's high-performance rendering provides everything you need to build incredible interactive experiences.