use signal here instead of usestate

[KillariDev]

          Wouldn't be much to switch to signal as the entire component already is utilizing it already anyway

// const [isOpen, setIsOpen] = useState(false)
const dropdownOpen = useSignal(false)

_Originally posted by @jubalm in https://github.com/DarkFlorist/TheInterceptor/pull/1182#discussion_r1847740262_