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

.golangci.yml

@@ -70,7 +70,7 @@ issues:
     - path: modules/log/
       linters:
         - errcheck
-    - path: routers/routes/routes.go
+    - path: routers/routes/macaron.go
       linters:
         - dupl
     - path: routers/api/v1/repo/issue_subscription.go