* add circuits and tests for separable convolution. Circuits do not yet comply with repo`s quantization
* make depthwise circuit compliant with quantization method from repo
* make pointwise circuit compliant with quantization method from repo
* separable convolution test works
* clean up
* fix typos and skip failing test
* clean up duplicated code for depthwise conv
* clean up duplicated code for pointwise conv
* clean up duplicated code for separable conv notebook
* chore: update filename to capital case
---------
Co-authored-by: drCathieSo.eth <socathie@users.noreply.github.com>