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/trains.lua

@@ -32,7 +32,7 @@ commands.set_trains_to_automatic = Commands.new("set-trains-to-automatic", { "ex
         end
 
         game.print{ "exp-commands_trains.response", format_player_name(player), format_number(#trains, false) }
-    end) --[[ @as any ]]
+    end) --[[@as any]]
 
 return {
     commands = commands,