Add support for idefics3 (SmolVLM) (#1059)
* [WIP] Add support for idefics3 (SmolVLM)
* Cleanup
* Update `DataTypeMap` with 4-bit data types
* Format the model inputs before logging to console
* Use QUInt8 when quantizing models produced by onnxruntime-genai
* `auto` dtype selection
* Export `load_image` helper function
* Add listed support for Idefics3
* Add support for batched 2d images in idefics3 processor
* Update unit tests
* Add another unit test to ensure correctness of pixel attention mask placement
* Move image tokens out of call function
* Formatting
* Improve auto selection logic
* Return correct pixel_attention_mask
* Update pixel_attention_mask unit test
* Formatting
* Add idefics3 unit tests
* Increase idefics processor unit test timeout
