StateFlow Blog (#1826)

* init PR

* update

* update code check

* update

* update

* update

* update

* update

* Test the ability to have agents a,u,t,o,g,e,n speak in turn.

* update

* update

* update

* Evidence that groupchat not terminating because of the TERMINATE substring.

* Raising NoEligibleSpeakerException allows graceful exit before max turns

* update

* update

* update

* update

* update

* update

* update

* update

* update

* update

* update

* update

* update

* udpate to comments

* update

* Update website/blog/2024-02-29-StateFlow/index.mdx

Co-authored-by: Chi Wang <wang.chi@microsoft.com>

* update links

* remove unnecessary changes

* Update website/blog/2024-02-29-StateFlow/index.mdx

Co-authored-by: Joshua Kim <joshkyh@users.noreply.github.com>

* Update website/blog/2024-02-29-StateFlow/index.mdx

Co-authored-by: Joshua Kim <joshkyh@users.noreply.github.com>

* remove test for custom notebook

* update

* update

---------

Co-authored-by: Joshua Kim <Joshua@spectdata.com>
Co-authored-by: Chi Wang <wang.chi@microsoft.com>
Co-authored-by: Joshua Kim <joshkyh@users.noreply.github.com>