add tool to compare two tests results, show difference 

[TTS]add aishell3 voice cloning with ECAPA-TDNN spk encoder

* Added pre-install doc for G2P and TN modules and updated the dependency version of pypinyin, test=doc

Add Chinese doc and language switcher for demos of metaverse, style_fs2 and story_talker

[s2t] fix deepspeech2 decode_wav 

fix a small bug for  benchmank 

fix the filepath bug

solve the bug of training mdtc_bs16_fp32

* code for training vits voice clone on aishell3.
Co-authored-by: TianYuan <white-sky@qq.com>

* Update application.yaml

[s2t] fix format test=asr