Add image/video to the description of modules

[IgnacioHeredia]

@falibabaei @vykozlov

We should make sure that at least "our" modules have a pretty image/video in the description. Otherwise they won't be very appealing in the Dashboard.

I'm thinking, among others, about YOLO, FasterRCNN, Semantic segmentation Vainingen, etc.
Optionally we can make PRs to add images to usecase's modules.

For reference, follow the ai4-metadata.yml of the image classification module.

[falibabaei]

Hi @IgnacioHeredia
I started with the yolov8 and faster rcnn