refactor: keep only RAG example for Albert API

- Remove chat.php example
- Update README to point to rag.php
- Focus on Albert's key differentiator: built-in RAG capabilities

Author: OskarStark

README.md

@@ -141,7 +141,7 @@ $response = $chain->call($messages, [
 1. [Google's Gemini with Google](examples/google/chat.php)
 1. [Google's Gemini with OpenRouter](examples/openrouter/chat-gemini.php)
 1. [Mistral's Mistral with Mistral](examples/mistral/chat-mistral.php)
-1. [Albert API (French Sovereign AI)](examples/albert/chat.php)
+1. [Albert API (French Sovereign AI)](examples/albert/rag.php)
 
 ### Tools
 

examples/albert/README.md

@@ -13,13 +13,7 @@ export ALBERT_API_KEY="your-api-key"
 export ALBERT_API_URL="https://your-albert-instance.com"
 ```
 
-## Examples
-
-### Basic Chat
-```bash
-php examples/albert/chat.php
-```
-Demonstrates basic conversation with Albert API.
+## Example
 
 ### RAG (Retrieval-Augmented Generation)
 ```bash