core: add translations to all texts

mods/dark-ui-elements.lua

@@ -1,11 +1,12 @@
 local _G = ShaguTweaks.GetGlobalEnv()
+local T = ShaguTweaks.T
 local HookAddonOrVariable = ShaguTweaks.HookAddonOrVariable
 local GetExpansion = ShaguTweaks.GetExpansion
 local AddBorder = ShaguTweaks.AddBorder
 
 local module = ShaguTweaks:register({
-  title = "Darkened UI",
-  description = "Turns the entire interface into darker colors.",
+  title = T["Darkened UI"],
+  description = T["Turns the entire interface into darker colors."],
   expansions = { ["vanilla"] = true, ["tbc"] = true },
   enabled = nil,
   color = { r = .3, g = .3, b = .3, a = .9}