Snackbar host

Shows snackbars one at a time from a host state, usually in a scaffold.

val host = rememberJengaSnackbarHostState()
val scope = rememberCoroutineScope()
JengaButton(
    text = "Save",
    onClick = {
        scope.launch {
            host.showSnackbar(
                message = "Saved offline",
            )
        }
    },
)
JengaSnackbarHost(
    hostState = host,
)