feat: add upload to s3 example

[McPatate]

Adding an example script to upload a file to s3

[Narsil]

I would personally leave it as a single file to keep thing compact, and especially since there's only shallow dependencies.

examples/upload_to_s3.py

#!pip install boto==1.26.98

within the file if you really want to keep them here.

[McPatate]

True, I've added a comment with the pip install without the !