I don't think there should be anything too controversial in here from a content perspective.  This diff:

• Removes code that's no longer used in tutorial sections.
• Renames files and directories to match the new structure of the tutorial.
• Has the solids in the "complex pipeline" return single values instead of tuples.
• Uses f-strings in some places I missed them in my last rev.
• Fixes some typos and places where the code or screenshots did not match the language.

manual inspection