docs/writeup/paper.qmd (2pp NeurIPS), references.bib, neurips_2023.sty, the
quarto _extensions. justfile gains `paper` (latex) and `paper-html` (no latex)
recipes. gitignore the generated paper.pdf/paper.tex and the transient .claude/.
Co-Authored-By: Claudypoo <288921227+claudypoo@users.noreply.github.com>
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