Improved serialization guide

documentation/docs/guides/serialization.mdx

@@ -21,24 +21,10 @@ To serialize data, just return the data you want to serialize from your controll
 - Plain text `Accept: text/plain`
 
 ```go
-package main
-
-import (
-	"github.com/go-fuego/fuego"
-)
-
 type MyReturnType struct {
 	Message string `json:"message"`
 }
 
-func main() {
-	s := fuego.NewServer()
-
-	fuego.Get(s, "/", helloWorld)
-
-	s.Run()
-}
-
 func helloWorld(c fuego.ContextNoBody) (MyReturnType, error) {
 	return MyReturnType{Message: "Hello, World!"}, nil
 }
@@ -56,24 +42,10 @@ func helloWorld(c fuego.ContextNoBody) (MyReturnType, error) {
 To deserialize data, use the `fuego.ContextWithBody` type in your controller.
 
 ```go
-package main
-
-import (
-	"github.com/go-fuego/fuego"
-)
-
 type ReceivedType struct {
 	Message string `json:"message"`
 }
 
-func main() {
-	s := fuego.NewServer()
-
-	fuego.Post(s, "/", echo)
-
-	s.Run()
-}
-
 func echo(c fuego.ContextWithBody[ReceivedType]) (string, error) {
 	// Deserialize the HTTP Request body into ReceivedType,
 	// whether it's application/json, application/xml, application/x-www-form-urlencoded, etc.
@@ -103,6 +75,22 @@ fuego.Put(s, "/blob", func(c *fuego.ContextWithBody[[]byte]) (any, error) {
 })
 ```
 
+## Custom response - Bypass return type
+
+If you want to bypass the automatic serialization, you can directly write to the response writer.
+
+```go
+func helloWorld(c fuego.ContextNoBody) (any, error) {
+	w := c.Response()
+	w.Header().Set("Content-Type", "text/plain")
+	w.Write([]byte("Hello, World!")) // Write directly to the response writer. 
+	_ = json.NewEncoder(w).Encode(MyReturnType{Message: "Hello, World!"}) // You can also use json.NewEncoder(w).Encode to serialize data directly into JSON
+	fuego.SendJSON(w, MyReturnType{Message: "Hello, World!"}) // Or use fuego.SendJSON to serialize data directly into JSON
+
+	return nil, nil // If you return nil, nil fuego will not try to serialize a response
+}
+```
+
 ## Custom serialization
 
 But you can also use the `Serialize` and `Deserialize` functions to manually serialize and deserialize data.