adding cell metadata for extraction into docs

[Blackmist]

Description

Adds metadata tag named "name" to code cells. Tags allow us to extract code cells into documentation, meaning docs can always pull from the sample as the single source of truth.

Checklist

• [ x ] I have read the contribution guidelines
• [ x ] I have coordinated with the docs team ([email protected]) if this PR deletes files or changes any file names or file extensions.
• [ x ] This notebook or file is added to the CODEOWNERS file, pointing to the author or the author's team.