Introduce go chi web framework as frontend of macaron, so that we can move routes from macaron to chi step by step (#7420)

* When route cannot be found on chi, go to macaron

* Stick chi version to 1.5.0

* Follow router log setting

vendor/github.com/go-chi/chi/middleware/value.go

@@ -0,0 +1,17 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+)
+
+// WithValue is a middleware that sets a given key/value in a context chain.
+func WithValue(key interface{}, val interface{}) func(next http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		fn := func(w http.ResponseWriter, r *http.Request) {
+			r = r.WithContext(context.WithValue(r.Context(), key, val))
+			next.ServeHTTP(w, r)
+		}
+		return http.HandlerFunc(fn)
+	}
+}