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Add Object Detection Segmentation and Video Analysis Notebooks

See merge request !10

# Conflicts:
#	notebooks/Object Detection and Segmentation/Exercises - Object Detection and Segmentation - Colab.ipynb

```text
    The user requested numpy==1.19.1
    altair 4.1.0 depends on numpy
    gluoncv 0.10.5.post0 depends on numpy
    imageio 2.22.4 depends on numpy
    matplotlib 3.3.1 depends on numpy>=1.15
    mxnet 1.9.1 depends on numpy<2.0.0 and >1.16.0
    opencv-python 4.4.0.46 depends on numpy>=1.19.3
```

```text
he conflict is caused by:
    The user requested protobuf==3.20.0
    wandb 0.12.17 depends on protobuf<4.0dev and >=3.12.0
    tensorflow 2.7.1 depends on protobuf>=3.9.2
    tensorflow-docs 0.0.0.dev0 depends on protobuf<3.20 and >=3.12.0
```

```text
ERROR: Cannot install -r /tmp/requirements.txt (line 2), -r /tmp/requirements.txt (line 3) and pillow==8.0.0 because these package versions have conflicting dependencies.
The conflict is caused by:
    The user requested pillow==8.0.0
    gluoncv 0.10.5.post0 depends on Pillow
    imageio 2.22.4 depends on pillow>=8.3.2
```