[speechx] fix format of custom demos

[Doc] Add PP-ASR

[Doc] Create streaming_asr_demo.rst

[server] fix cors

[speechx] add custom_streaming_asr

[speechx] fix cmvn_2_kalditype compile error

[doc]add pptts readme

[Server] fix server doc and decode_method

[tts] normalize wav max value to 1 in preprocess, test=tts

[doc]add streaming tts demo, test=doc

[server] improve code

[server]change vector train.py local_rank to rank

[CLI] Add cacu rtf scripts