Update tutorials to use dot notation for accessing data objects from Sets and Container types

[ehennestad]

Depends on PR #705

Motivation

Update tutorials based on changes in PR #705

How to test the behavior?

Show here how to reproduce the new behavior (can be a bug fix or a new feature)

Todo:

• [ ] basicUsage.mlx
• [x] behavior.mlx
• [ ] dynamic_tables.mlx
• [ ] dynamically_loaded_filters.mlx
• [ ] ecephys.mlx
• [ ] icephys.mlx
• [ ] images.mlx
• [x] intro.mlx
• [ ] ogen.mlx
• [ ] ophys.mlx
• [ ] read_demo.mlx
• [x] read_demo_dandihub.mlx
• [ ] scratch.mlx

Checklist

• [x] Have you ensured the PR description clearly describes the problem and solutions?
• [x] Have you checked to ensure that there aren't other open or previously closed Pull Requests for the same change?
• [x] If this PR fixes an issue, is the first line of the PR description fix #XX where XX is the issue number?