Added an example that uses the Moderation API to check for compliance in images

[narenoai]

This example provides a way to use the moderation api to check if images are potentially harmful and if so why.

Summary

This commit adds a python example to check an image using the moderation API. It also provides a way to batch check multiple images from URLs.

Motivation

Using the moderation api to check if an image is complaint or not can be very useful for a lot of use cases.

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[phundal-openai]

Hi Naren,

Great work here... 2 items I would offer for consideration:

1. Borrow the layout, explanation, and dependency setup from this cookbook: https://cookbook.openai.com/examples/gpt4o/introduction_to_gpt4o

2. Consider taking this work and creating an additional image moderation section to this existing cookbook:

   openai-cookbook/examples/How_to_use_moderation.ipynb

   Line 4 in 17e9c2d

   "cell_type": "markdown",

It may or may not make sense to build on the existing cookbook, but worth considering.

[narenoai]

@phundal-openai I deleted the new cookbook and modified the existing moderation cookbook and added checking an image as an additional example. d0e5241

[phundal-openai]

This looks great - nice addition.