Make the @as casts actually apply

emmylua only parses the inline cast as `--[[@as T]]`, the spaced form
`--[[ @as T ]]` is treated as a plain comment, so all 149 of them were
doing nothing.

LuaGuiElement.style is a union because a style name can be assigned to
it, so reading it back needs the cast.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

exp_scenario/module/commands/artillery.lua

@@ -43,7 +43,7 @@ commands.artillery = Commands.new("artillery", { "exp-commands_artillery.descrip
         end
         SelectArea:start(player)
         return Commands.status.success{ "exp-commands_artillery.enter" }
-    end) --[[ @as any ]]
+    end) --[[@as any]]
 
 --- when an area is selected to add protection to the area
 SelectArea:on_selection(function(event)