Added router benchmarks

examples/hello/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"net/http"
+
+	"git.akyoto.dev/go/server"
+)
+
+func main() {
+	s := server.New()
+
+	s.Get("/", func(ctx server.Context) error {
+		return ctx.String("Hello")
+	})
+
+	http.ListenAndServe(":8080", s)
+}