Add `id` function to Tinkr WowGameObject

Tinkr.lua

@@ -8,6 +8,7 @@
 ---@class WowGameObject : userdata
 ---@field unit fun(): UnitIds
 ---@field guid fun(): string
+---@field id fun(): ...:number
 
 ---@alias TinkrObjectReference WowGameObject | UnitIds
 
@@ -1362,7 +1363,7 @@ local TinkrUtil = {
 	---@type Tinkr.Util.Modules.Draw
 	Draw = {},
 	LibStub = LibStub,
-	JSON = Tinkr.Util.Modules.JSON,
+	JSON = Tinkr.Util.JSON,
 	Serialize = {},
 }
 --#endregion Tinkr.Util