"Advanced" topics need to be better integrated

[brian-rose]

Several of the "advanced" chapters have redundant material that overlaps with the "regular" notes on that topic, e.g.

• https://brian-rose.github.io/ClimateLaboratoryBook/courseware/advanced-sensitivity-feedback.html
• https://brian-rose.github.io/ClimateLaboratoryBook/courseware/advanced-heat-transport.html
• https://brian-rose.github.io/ClimateLaboratoryBook/courseware/advanced-albedo-feedback.html
• https://brian-rose.github.io/ClimateLaboratoryBook/courseware/advanced-snowball-earth.html

The overlaps are relics of the merging of the undergraduate and graduate versions of my lecture notes. Need to smooth out these rough edges.

[brian-rose]

This will be a nice use case for embedding content with myst.