* Small fixes to (un)patch_tensorflow api doc and make its import path in api doc show as the recommended one
* Add api doc for nano_bf16 decorator
* Move api doc for bigdl.nano.tf.keras.InferenceOptimizer out of bigdl.nano.tf.keras to make it more clear
* Fix python styles
* Fix path in Nano PyTorch API docs
* Add api doc for bigdl.nano.pytorch.patching.patch_encryption
* Add a note box for bigdl.nano.pytorch.patching.patch_encryption api doc
* Fix Python style again
* Fix path in Nano HPO API doc and other small fixes
* add optimizer.py
* fix style
* set version for mypy
* add thread control for quantize, support openvino pot
* update optimizer
* fix typo
* update workflow
* temp commit
* modify ut
* refactor optimizer
* rebase, update based on comments
* Add api docs for bigdl.nano.tf.keras.layers.Embedding and bigdl.nano.tf.optimizers.SparseAdam
* Update API document link in related how-to guide
* Remove non-related parameter explanation for Embedding
* Add param explanation for kwargs in for Embedding, and small revision
* Small fix