Use ModelRegistry for pipeline file loading (#1555)
* Fallback to config.model_type for class resolution
Sometimes config.architectures isn't specified (usually encoder-only)
e.g., https://huggingface.co/onnx-community/mediapipe_selfie_segmentation
* Use model registry for pipeline file loading
* Update packages/transformers/src/pipelines.js
Co-authored-by: Nico Martin <mail@nico.dev>
* Formatting
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Co-authored-by: Nico Martin <mail@nico.dev>
