add gpt2 model for the paddlenlp

* update docs

* support AMP training

add peoplesner, fix msraner (#5183)

* add pure fp16 training.

* Add lookup_table in custom_black_list during the pure fp16 training.

* support pad seq and bsz multi

* alter vocab size

* alter md5sum

* root for reader

* add static predict

* rm position_encoding_init

* fix static predict

* add the xpu support the the paddlenlp

* add the support xpu for the ernie and bert
Co-authored-by: Nwawltor <fanzeyang0904@hotmail.com>

* upgrade MapDatasetWrapper

* minor fix

* refine code

* new chunk_eval

* np first

* add embedding example in embeddings.md

* add embedding.md link in toke_embedding readme

* fix windows url bug

* add more English embedding name

* fix doc bug

* delete useless description

* add comments of TokenEmbedding

* add embedding model info

* fix readme and change cross-entropy api

* change api back

* update codes

* update codes

* update codes

* update docs

* update docs

* update docs

* update docs

* update codes

* update codes

* update codes

* update docs

* update docs

fix url bug for word2vec

* add the benchmark glue for some task

* fix the qnil result for the bert benchmark

* change the from the logger to framework logger

fix bugs;add more baidu embedding name

* fix bleu bug

* fix bleu bug

* fix doc example

* minor fix

* fix squad dataset bug

* fix readme

* fix delimiter

* fix bleu bug

* update __init__

* update couplet api usage, delete useless import

* update seq2seq readme

* update seq2seq readme path

* Add the copyright for the word-embedding

* add the the link for the chinese word embedding

* update lrscheduler

* minor fix

* add pre-commit

* minor fix

* Add __len__ to squad dataset

* minor fix

* Add dureader robust prototype

* dataset implement

* minor fix

* fix var name

* add dureader-yesno train script and dataset

* add readme and fix md5sum

* integrete dureader datasets

* change var names: segment to mode, root to data_file

* minor fix

* update var name

* Fix api bugs

* add dataset readme

* add express ner

* update readme format

* fix format bug

* change readme path

* fix format bug

* fix dataset bug

* add 2 datasets and update squad metric

* add ernie_gen

* optimize ernie_gen

* optimize ernie_gen

* optimize ernie_gen code

* fix crf bug

* add ernie_gen __init__.py

* modify nlp version

* fix ernie_gen predict

add ernie_gen for the dygraph mode

* fix translation dataset and simplify transformer reader

update codes for paddenlp text cls example

update the readme for the word_embedding (#5050)

* add all wiki embedding and part of baidu encyclopedia embedding.

* add embedding example

* add people_daily, weibo, sougou pretrained embedding

* add zhihu, finacial,literature embedding

* Add embedding model readme; add embedding train example and readme

* fix README example

* fix embedding doc

* add paddle.models api reference docs

* update docs

* update docs

* update docs

* tmp

* update docs

* update docs

* update docs

* update docs

* update docs

* update docs

* fix translation.py bugs

* delete useless comments

* set couplet download root None

* add paddle.models api reference docs

* update docs

* update docs

* update docs

* tmp

* update docs

* update docs

* update docs

* update docs

* add metric readme doc

* add "`" for APIs in doc

* Update README.md

Add "`" for APIs in doc

* Update metrics.md

* Update README.md

* update metric readme