Add example and change some code

src/controller.rs

@@ -1,7 +1,5 @@
-use std::collections::HashMap;
-
-use tiny_http::Request;
+use crate::router::Router;
 
 pub trait Controller {
-    fn register_routes(&self) -> HashMap<String, fn(Request)>;
+    fn register_routes(&self, router: &mut impl Router);
 }

src/router.rs

@@ -5,6 +5,11 @@ use crate::controller::Controller;
 pub trait Router {
     fn new() -> Self;
     fn route(&self, request: Request);
-    fn add_controller(&mut self, controller: impl Controller);
+    fn add_controller(&mut self, controller: impl Controller)
+    where
+        Self: Sized,
+    {
+        controller.register_routes(self);
+    }
     fn add_route(&mut self, route: &str, route_function: fn(Request));
 }