Fix Quarto support when only R is enabled#75
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Quarto documents failed to render and had no buffer-level syntax highlighting or chunk recognition when only the R language spec was activated.
Root causes & fixes
Missing
knitr/rmarkdowninreqPkgs(overlays/r.nix)Quarto's R execution engine requires these packages in
extraRPackages; without themquarto renderfails on any.qmdwith R chunks.markdowncategory never enabled (flake.nix→packageDefinitions)The upstream nixCatsConfig bundles
quarto-nvimandotter-nvimunder themarkdowncategory. The template didn't wire it up, so those plugins were never loaded — no chunk boundaries, no embedded syntax highlighting.Dev shell quarto had no R packages (
flake.nix→devShells)languagePackageswas pullingpkgs.quartofrom unoverlaied nixpkgs. Replaced with an overlaid instance (viarixOverlay+rOverlay) so the terminal-levelquarto renderuses the same R-aware binary as the Neovim wrapper.