theme: zathura takes the YoRHa palette

A local zathura/yorha replaces the catppuccin include. Pages are
recoloured onto the hull with bone text while images keep their
colours, the index and completion select with the light slab, and
search hits use a bone wash with the current hit in sand.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

quickshell/README.md

@@ -295,6 +295,7 @@ dark, the rim hairline and the wallpaper, not from patterns.
 | `btop/themes/yorha.theme` | the resource monitor |
 | `gtk-3.0/gtk.css`, `gtk-4.0/gtk.css` | GTK and libadwaita apps |
 | `qt6ct/colors/yorha.conf` | Qt apps |
+| `zathura/yorha` | the document viewer |
 
 Everything else derives. `glow` *is* `accent`, and `primary` is plain `text`.
 `Theme.heat()` is a continuous text → light → red ramp, so a CPU figure that
@@ -335,6 +336,9 @@ network and bluetooth, but keep running as the secret and pairing agents.
   `gsettings` for portal-aware apps.
 - **Qt** — qt6ct with `qt6ct/colors/yorha.conf`, the same palette in
   `QPalette` roles. The style is Fusion unless Darkly is installed.
+- **zathura** — `zathura/yorha`, included from `zathurarc`. Pages are
+  recoloured onto the hull with text in bone; images keep their colours.
+  Search hits are a soft bone wash, and the current hit is sand.
 - **Fish** — `fish/conf.d/yorha_theme.fish`.
 - **The launcher** — no external theming to keep in step, because it is part of
   this shell (`launcher/`). Fuzzel is gone; `takemi-dmenu` stands in for