Tejas Dharani

Feat/gpt5 support

2

## Why are these changes needed? This PR introduces **GPT-5 support** across the Autogen core and extensions, enabling developers to build agents and tools that fully utilize GPT-5’s advanced reasoning...

## Why are these changes needed? Fixes https://github.com/microsoft/autogen/pull/6051 Updated to resolve CI issues by creating a clean implementation. This replaces the original PR with a clean implementation.

Fix groupchat responses api

6

## Why are these changes needed? This PR resolves a compatibility issue that caused **GroupChat** to fail when using OpenAI’s **Responses API**. Added **streaming response support** and proper ID handling...