[Docs]: Document how to leverage the duck DB connector to connect to a private S3 bucket with parquet

[mcrascal]

Request Type

Walkthrough Request (new tutorial for a particular feature or use case)

Description

Add a section to the docs describing how to connect to a private S3 bucket using the duck DB connector, and the initialize script added here: https://github.com/evidence-dev/evidence/pull/2086/files

Are you interested in contributing this improvement to the docs?

I'm just making a suggestion