Make StaticCache configurable at model construct time (#32830)

* Make StaticCache configurable at model construct time

* integrations import structure

* add new doc file to toc

---------

Co-authored-by: Guang Yang <guangyang@fb.com>
Co-authored-by: Joao Gante <joao@huggingface.co>

docs/source/en/_toctree.yml

@@ -296,6 +296,8 @@
       title: Trainer
     - local: main_classes/deepspeed
       title: DeepSpeed
+    - local: main_classes/executorch
+      title: ExecuTorch
     - local: main_classes/feature_extractor
       title: Feature Extractor
     - local: main_classes/image_processor

docs/source/en/main_classes/executorch.md

@@ -0,0 +1,33 @@
+<!--Copyright (c) Meta Platforms, Inc. and affiliates.
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+
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+
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+
+
+# ExecuTorch
+
+[`ExecuTorch`](https://github.com/pytorch/executorch) is an end-to-end solution for enabling on-device inference capabilities across mobile and edge devices including wearables, embedded devices and microcontrollers. It is part of the PyTorch ecosystem and supports the deployment of PyTorch models with a focus on portability, productivity, and performance.
+
+ExecuTorch introduces well defined entry points to perform model, device, and/or use-case specific optimizations such as backend delegation, user-defined compiler transformations, memory planning, and more. The first step in preparing a PyTorch model for execution on an edge device using ExecuTorch is to export the model. This is achieved through the use of a PyTorch API called [`torch.export`](https://pytorch.org/docs/stable/export.html).
+
+
+## ExecuTorch Integration
+
+An integration point is being developed to ensure that 🤗 Transformers can be exported using `torch.export`. The goal of this integration is not only to enable export but also to ensure that the exported artifact can be further lowered and optimized to run efficiently in `ExecuTorch`, particularly for mobile and edge use cases.
+
+[[autodoc]] integrations.executorch.TorchExportableModuleWithStaticCache
+    - forward
+
+[[autodoc]] integrations.executorch.convert_and_export_with_cache