Overhaul Tracking Issue

[danielballan]

• [ ] Every old notebook that is still useful should be updated to pass CI, otherwise deleted. No more bit rot in this house! :- D
• [ ] Ensure all matplotlib figures are placed in dedicated cells, to avoid #37.
• [ ] Remove all usages of %run; instead, import things (and add thing as needed) to the new bluesky_tutorial_utils package in this repo.
• [ ] Add a notebook explaining the fundamental objects: RE, catalog, bec which we can link to from the "initial setup" sections of other notebooks.