Function decompose 

pub fn decompose(
    signal: ArrayViewMut1<'_, f32>,
    buffer: ArrayViewMut1<'_, f32>,
    wavelet: Wavelet<'_>,
)

Forward wavelet transform, 1D, only once, inplace.

[      Signal      ] => [ Approx ][ Detail ]

Hard requirements

• buffer_size >= signal_size + window_size - TWO