* update wfst script

* add skip blank

* refactor recognizer_controller
* clean frontend file

* support vad ios compile

* support onnx model recognize

* add build ios sh

* rename speechx

* fix wfst decode error

* replace reset with make_unique

* add recognizer_batch

* fix nnet thread crash && rescore cost time

* add nnet thread main

* replace kaldi-fbank with kaldi-native-fbank

* make kaldi-native-fbank work

* add nnet cache && make 2 thread work

* do not compile websocket

* refactor directory

* 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