add use_router hook

packages/router/src/lib.rs

@@ -1,3 +1,12 @@
+pub(crate) mod contexts {
+    pub(crate) mod router;
+}
+
+pub mod hooks {
+    mod use_router;
+    pub use use_router::*;
+}
+
 pub mod prelude {
     pub use dioxus_router_core::prelude::*;
 }