Replace fixed-interval OnUpdate polls with C_Timer/RunNextFrame

Swap hand-rolled per-frame throttles for the modern timer primitives:

- turtle-wow: one-shot next-frame defer (self-hiding OnUpdate frame) -> RunNextFrame
- panel: clock, combat, and fps widgets -> NewTicker(1); guild roster -> NewTicker(60)
- minimap: coordinates text -> NewTicker(0.1)
- addonbuttons: one-shot init -> RunNextFrame; 5s button rescan -> NewTicker(5),
  guarded by IsShown() to preserve the old "paused while hidden" behavior

Ticker callbacks reference frames via upvalue since 'this' is unbound outside
OnUpdate. Genuine per-frame work (bar fills, fades, drag) and polls already
coordinated through pfUI.throttle are left as-is.

modules/turtle-wow.lua

@@ -80,10 +80,7 @@ pfUI:RegisterModule("turtle-wow", function ()
     end)
   end
 
-  local delay = CreateFrame("Frame")
-  delay:SetScript("OnUpdate", function()
-    this:Hide()
-
+  RunNextFrame(function()
     -- correct positions of new game menu layout
     if GameMenuButtonShop and (GameMenuButtonPFUI or GameMenuButtonPFUIAddOns) then
       -- calculate new offset for the shop button