[SageMaker] New Flux.2 image generation example (#2649)

* [SageMaker] Add example for Flux.2 image generation with SageMaker

* Enhance auto-update script to add author and last update date to examples

* Fix doc building

* Add PIL import for image drawing

* Add security warning about Gradio share

* Update notebook images paths

* Update local notebook image paths to use hosted copies from the huggingface/documentation-images dataset

* Fix image path generation

* Apply Cursor bot suggestions

* Add Hugging Face author metadata support in auto-update script

* Fix author link format

* Remove duplicated imports and image processing functions

Author: ehcalabres