feat(extras): added colors for zathura (#385)

Added TokyoNight colorscheme for [zathura](https://pwmt.org/projects/zathura/) document viewer.

lua/tokyonight/extra/init.lua

@@ -21,6 +21,7 @@ M.extras = {
   terminator = {ext = "conf", url = "https://gnome-terminator.readthedocs.io/en/latest/config.html", label = "Terminator"},
   prism = {ext = "js", url = "https://prismjs.com", label = "Prism"},
   windows_terminal = {ext = "json", url = "https://aka.ms/terminal-documentation", label = "Windows Terminal"},
+  zathura = {ext = "zathurarc", url = "https://pwmt.org/projects/zathura/", label = "Zathura"},
 }
 
 local function write(str, fileName)

lua/tokyonight/extra/zathura.lua

@@ -0,0 +1,53 @@
+local util = require("tokyonight.util")
+
+local M = {}
+
+--- @param colors ColorScheme
+function M.generate(colors)
+  local zathura = util.template(
+    [[
+# Tokyonight color theme for Zathura
+# Swaps Foreground for Background to get a light version if the user prefers
+#
+# Tokyonight color theme
+#
+set notification-error-bg "${red}"
+set notification-error-fg "${fg}"
+set notification-warning-bg "${yellow}"
+set notification-warning-fg "${terminal_black}"
+set notification-bg "${bg}"
+set notification-fg "${fg}"
+set completion-bg "${bg}"
+set completion-fg "${fg_dark}"
+set completion-group-bg "${bg}"
+set completion-group-fg "${fg_dark}"
+set completion-highlight-bg "${terminal_black}"
+set completion-highlight-fg "${fg}"
+set index-bg "${bg}"
+set index-fg "${fg}"
+set index-active-bg "${terminal_black}"
+set index-active-fg "${fg}"
+set inputbar-bg "${bg}"
+set inputbar-fg "${fg}"
+set statusbar-bg "${bg}"
+set statusbar-fg "${fg}"
+set highlight-color "${yellow}"
+set highlight-active-color "${green}"
+set default-bg "${bg}"
+set default-fg "${fg}"
+set render-loading true
+set render-loading-fg "${bg}"
+set render-loading-bg "${fg}"
+#
+# Recolor mode settings
+# <C-r> to switch modes
+#
+set recolor-lightcolor "${bg}"
+set recolor-darkcolor "${fg}"
+]],
+    colors
+  )
+  return zathura
+end
+
+return M