Add support for Gemma3n (#1348)
* Align llava processor with python library
* Add support for llava_qwen2
* Update llava unit tests
* Fix test
* Update florence2 processor & tests
* Update florence2 unit tests
* Add support for gemma3n
* Pass input_features_mask to audio encoder
* Implement gemma3n feature extraction
* npm audit fix
* Add model to supported list
* Fix JSDoc
