* 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
Hui Zhang