Build "Getting started with AI" as the first learning path

Create the first concrete learning path — "Getting started with AI" — to validate the learning path structure and deliver immediate user value.

The issue does not identify files, tests, or an existing learning-path entry point. First inspect the repository for the learning-path structure and existing content, then define the scope of the “Getting started with AI” path; it is done when the first concrete path is integrated and usable.

Written by the indexing model from the issue text.