docs: added std example to readme and middleware with correct syntax …

…to docs page

README.md

@@ -127,6 +127,36 @@ func main() {
 }
 ```
 
+### Std lib compatibility
+
+```go
+package main
+
+import (
+	"net/http"
+	"github.com/go-fuego/fuego"
+)
+
+func main() {
+	s := fuego.NewServer()
+
+	// Standard net/http middleware
+	fuego.Use(s, func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("X-Hello", "World")
+			next.ServeHTTP(w, r)
+		})
+	})
+
+	// Standard net/http handler with automatic OpenAPI route declaration
+	fuego.GetStd(s, "/std", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("Hello, World!"))
+	})
+
+	s.Run()
+}
+```
+
 <details>
 <summary>All features</summary>
 

documentation/docs/guides/middlewares.md

@@ -56,7 +56,7 @@ func main() {
 	// Add a middleware to a group of routes
 	api := s.Group(s, "/api")
 
-	api.Use(func(next http.Handler) http.Handler {
+	fuego.Use(api, func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			// Do something before the request
 			// Only affects routes in the group

go.work.sum

@@ -179,6 +179,7 @@ github.com/shopspring/decimal v1.2.0/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFR
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.9.2/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/snowflakedb/gosnowflake v1.6.19/go.mod h1:FM1+PWUdwB9udFDsXdfD58NONC0m+MlOSmQRvimobSM=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=