* update u2pp latest static graph

* add requirement

* add utils

* update doc

* update result

* update result

* update result

* fix cmake

* imporove scripts

* update result

* add quant model and script

* add profiling timer

add kws in README

add kws release model.

[Text]Add Rhythm Prediction Function

[speechx] add u2/u2pp asr inference

[doc] update wenetspeech u2pp  RESULT.md

[TTS]Add SSML for Chinese Text Frontend