Add OCR pptx file example

[JadyLiu]

Cookbook Pull Request

Description

Please include a summary behind the objective of this PR and list any dependencies that are required for this change.
Do not forget to hide or delete any API KEY used.

This is a sample notebook to show how OCR works with pptx file

Type of Change

What type of PR is it?

• New Cookbook
  • [ x ] Notebook File
    • Does it work on google colab?
  • Markdown File
• Cookbook Update
  • Code Refactoring
  • Bug Fix
• README.md Update

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• Other (please describe):

Cookbook Checklist:

• [ x ] My code is easy to read and well structured.
• [ x ] I've tagged the versions of any dependency required.
• [ x ] I have performed a self-review of my own code.
• [ x ] I have commented my code, particularly in hard-to-understand areas.
• [ x ] My changes generate no new warnings or errors.

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• My changes do not concern the cookbooks.

README.md Checklist

• I've added my cookbook to the table.

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• My changes do not concern the README file.

Additional Context

Add any other context or screenshots about the feature request here.

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[jaccolor2]

Hi! Thank you a lot for your cookbook!

Just a few things before we can merge:

• would it be possible to develop the first paragraph to give more context to the readers?
• could you provide a visual, maybe to explain how the cookbook works for example?

Thanks a lot!

[pragra]

Nice cookbook! Can we add a sample docx here as well? Both should work very similarly!