Openvino demos

[khatami-mehrdad]

Openvino demo notebooks added

1. openvino_demos/depth-anything
2. openvino_demos/segmenter-semantic-segmentation
3. openvino_demos/vision-monodepth
4. openvino_demos/vision-paddlegan-superresolution
5. openvino_demos/vision-superresolution

[shashichilappagari]

@khatami-mehrdad if we want openvino-demos in pysdkexamples, we need to have postprocessors in degirum_tools. Otherwise, people need to have the postprocessor file in a particular location for the example to work. So, when they want to replicate it outside of pysdkexamples, they will be forced to copy these files. By making custom postprocessors part of degirum-tools, the demo becomes self-sufficient.