Add template for adding flax models (#12441)
* Add option to add flax
* Add flax template for __init__.py
* Add flax template for .rst
* Copy TF modeling template
* Add a missing line in modeling_tf_... template
* Update first half of modeling_flax_..
* Update encoder flax template
* Copy test_modeling_tf... as test_modeling_flax...
* Replace some TF to Flax in test_modeling_flax_...
* Replace tf to np
some function might not work, like _assert_tensors_equal
* Replace remaining tf to np (might not work)
* Fix cookiecutter
* Add Flax in to_replace_... template
* Update transformers-cli add-new-model
* Save generate_flax in configuration.json
This will be read by transformers-cli
* Fix to_replace_... and cli
* Fix replace cli
* Fix cookiecutter name
* Move docstring earlier to avoid not defined error
* Fix a missing Module
* Add encoder-decoder flax template from bart
* Fix flax test
* Make style
* Fix endif
* Fix replace all "utf-8 -> unp-8"
* Update comment
* Fix flax template (add missing ..._DOCSTRING)
* Use flax_bart imports in template (was t5)
* Fix unp
* Update templates/adding_a_new_model/tests
* Revert "Fix unp"
This reverts commit dc9002a41d902c4f9b07343eab1cb350c8b7fd57.
* Remove one line of copied from to suppress CI error
* Use generate_tensorflow_pytorch_and_flax
* Add a missing part
* fix typo
* fix flax config
* add examples for flax
* small rename
* correct modeling imports
* correct auto loading
* corrects some flax tests
* correct small typo
* correct as type
* finish modif
* correct more templates
* final fixes
* add file testers
* up
* make sure tests match template regex
* correct pytorch
* correct tf
* correct more tf
* correct imports
* minor error
* minor error
* correct init
* more fixes
* correct more flax tests
* correct flax test
* more fixes
* correct docs
* update
* fix
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
