Standardize MEAI guide intro text

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: HavenDV

docs/guides/meai.md

@@ -3,7 +3,7 @@
 !!! tip "Cross-SDK comparison"
     See the [centralized MEAI documentation](https://tryagi.github.io/docs/meai/) for feature matrices and comparisons across all tryAGI SDKs.
 
-The `tryAGI.OpenAI` SDK natively implements [Microsoft.Extensions.AI](https://learn.microsoft.com/dotnet/ai/microsoft-extensions-ai/) interfaces, providing a unified abstraction layer for AI services across .NET applications.
+The OpenAI SDK implements `IChatClient` and `IEmbeddingGenerator<string, Embedding<float>>` from [Microsoft.Extensions.AI](https://learn.microsoft.com/en-us/dotnet/ai/microsoft-extensions-ai).
 
 ## Supported Interfaces