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

modules/public/dynamic.go

@@ -6,11 +6,9 @@
 
 package public
 
-import (
-	"gitea.com/macaron/macaron"
-)
+import "net/http"
 
 // Static implements the macaron static handler for serving assets.
-func Static(opts *Options) macaron.Handler {
+func Static(opts *Options) func(next http.Handler) http.Handler {
 	return opts.staticHandler(opts.Directory)
 }