resume train with epoch and iteration increase

add transformed v1.8 model

Doc 增加了 u2 和 1.8 模型

fix prof switch

more prof log

fix bench

fix log for u2

varbase getitem support np.longlong since paddle 2.2.0RC

VarBase.__getitem__ work for np.int64, np.longlong; but __setitem_varbase__ not support paddle.int16/set_value op not support

update u2 transformer config

tensor.size to tensor.shape

* can do frames, real stft

* format

* stft complex, powspec, magspec

* add common utils

* add window process func

* using frames and matmul as stft

* read with 2d; window process

* test with dither, remove dc offset, preermphs

* add doc string

* more frontend utils

* add logspec

* fix typing

* add delpoy mergify label

support benchmark scripts