tidy-animations

Build a "code-deconstructed" ggplot2 animation deck — ggplot2 code on the left, the plot lays down in 3D, explodes into one stacked semi-transparent paper card per code block, walks up highlighting each line and its slice, then collapses back to flat. Use when a user supplies a ggplot2 snippet and wants this treatment in the tidy-animations repo. Canonical impl: examples/ggplot2-deconstructed.qmd + js/ggplot2-deconstructed.html.