Port to Ascension 3.3.5 client

- Interface: 11200 -> 30300, add -coa1 version suffix and CoA metadata
  in VanillaGuide.toc.
- Local-shadow arg = {...} inside Di/Dv debug helpers in Core.lua so
  vararg access works under Lua 5.1 (WoW 3.3.5) instead of Lua 5.0
  (WoW 1.12).
- Add README-CoA.md documenting fork rationale, patched files, and
  remaining TODO (in-game smoke test, MetaMap -> pfQuest retarget,
  CoA-custom content slot, dynamic-scaling picker UX).

Core.lua

@@ -39,6 +39,7 @@ debug_verbose = false
 do
     function Di(...)
     	if debug_info then
+    	    local arg = {...}
     	    for k, v in pairs(arg) do arg[k] = tostring(v) end
     		local s = table.concat(arg, ", ")
     		s = string.gsub(s, "([=:]),", "%1")
@@ -48,6 +49,7 @@ do
     end
     function Dv(...)
         if debug_verbose then
+            local arg = {...}
             for k, v in pairs(arg) do arg[k] = tostring(v) end
             local s = table.concat(arg, ", ")
             s = string.gsub(s, "([=:]),", "%1")