* optimize lac and msra_ner example

* optimize ner and lac

* rename filename to lexical_analysis_dataset_tiny_path0

* modify lac dataset url

fix crf bug in paddlenlp

* fix doc

* fix version bug

fix lac bug (#5190)

* new chunk_eval

* np first

modify ernie_gen README (#5090)

* 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

* optimize doc

add ernie_gen for the dygraph mode

* optimize lac

* formatted

* optimize lac

* optimize lac