add must use to several hooks

packages/router/src/hooks/use_router.rs

@@ -3,6 +3,7 @@ use dioxus::prelude::ScopeState;
 use crate::{prelude::RouterContext, utils::use_router_internal::use_router_internal};
 
 #[deprecated = "prefer the use_navigator or use_route functions"]
+#[must_use]
 /// A hook that provides access to information about the router.
 pub fn use_router(cx: &ScopeState) -> &RouterContext {
     use_router_internal(cx)