Adds chapter 06.8 - HTTP methods support to Router

+ Update readme

Author: ishtms

Readme.md

@@ -274,6 +274,7 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Hints](/chapters/ch06.5-ex-implementing-a-trie.md#hints)
     - [Solution](/chapters/ch06.5-ex-implementing-a-trie.md#solution-1)
 - [Exercise 2 - Implementing our Trie based `Router`](/chapters/ch06.6-ex-implementing-router.md#exercise-2---implementing-our-trie-based-router)
+
   - [Challenge 1: Implementing the `addRoute` method](/chapters/ch06.6-ex-implementing-router.md#challenge-1-implementing-the-addroute-method)
     - [Requirements](/chapters/ch06.6-ex-implementing-router.md#requirements)
     - [More details](/chapters/ch06.6-ex-implementing-router.md#more-details)
@@ -293,7 +294,10 @@ The repo for our backend framework- [Velocy](https://github.com/ishtms/velocy).
     - [Example](/chapters/ch06.7-ex-adding-http-methods#example)
     - [Hints](/chapters/ch06.7-ex-adding-http-methods#hints)
     - [Solution](/chapters/ch06.7-ex-adding-http-methods#solution)
-- [Exercise 5 - Implementing Dynamic Routing](/chapters/ch06.9-ex-dynamic-routing#exercise-4-implementing-dynamic-routing)
+
+- [Adding HTTP methods to the Router](/chapters/ch06.8-adding-verbs-api.md)
+  - [Update the `TrieRouter` class](/chapters/ch06.8-adding-verbs-api.md#update-the-trierouter-class)
+- [Exercise 4 - Implementing Dynamic Routing](/chapters/ch06.9-ex-dynamic-routing#exercise-4-implementing-dynamic-routing)
   - [Why Dynamic Routing?](/chapters/ch06.9-ex-dynamic-routing#why-dynamic-routing)
     - [Flexibility](/chapters/ch06.9-ex-dynamic-routing#flexibility)
     - [Better User Experience](/chapters/ch06.9-ex-dynamic-routing#better-user-experience)

chapters/ch06.8-ex-adding-verbs-api.md

@@ -1,4 +1,4 @@
-## Exercise 5 - Implementing Dynamic Routing
+## Exercise 4 - Implementing Dynamic Routing
 
 When we're building a server application, dynamic routing is an essential feature for creating flexible and scalable applications. To fully grasp its significance and how we can enhance our router to support dynamic routes like `/users/:id`, let's delve into the concept of dynamic routing.