refactor: simplified extra template system and added docs

lua/tokyonight/extra/init.lua

@@ -9,6 +9,7 @@ local function write(str, fileName)
   file:close()
 end
 
+-- map of plugin name to plugin extension
 local extras = { kitty = "conf", fish = "fish", alacritty = "yml", wezterm = "toml", tmux = "tmux" }
 local styles = { "storm", "night", "day" }
 
@@ -16,6 +17,9 @@ for extra, ext in pairs(extras) do
   local plugin = require("tokyonight.extra." .. extra)
   for _, style in pairs(styles) do
     config.style = style
-    write(plugin[extra](config), extra .. "_tokyonight_" .. style .. "." .. ext)
+    config = config or require("tokyonight.config")
+    config.transform_colors = true
+    local colors = require("tokyonight.colors").setup(config)
+    write(plugin.generate(colors), extra .. "_tokyonight_" .. style .. "." .. ext)
   end
 end