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_commands/module/module_exports.lua

@@ -159,7 +159,7 @@ Commands.server = setmetatable({
         Commands.error("Command does not support rcon usage, requires LuaPlayer." .. key)
         error("Command does not support rcon usage, requires LuaPlayer." .. key)
     end,
-}) --[[ @as LuaPlayer ]]
+}) --[[@as LuaPlayer]]
 
 --- Status Returns.
 -- Return values used by command callbacks