Refactor names (#31405)

This PR only does "renaming":

* `Route` should be `Router` (and chi router is also called "router")
* `Params` should be `PathParam` (to distingush it from URL query param, and to match `FormString`)
* Use lower case for private functions to avoid exposing or abusing

routers/api/v1/user/helper.go

@@ -12,7 +12,7 @@ import (
 
 // GetUserByParamsName get user by name
 func GetUserByParamsName(ctx *context.APIContext, name string) *user_model.User {
-	username := ctx.Params(name)
+	username := ctx.PathParam(name)
 	user, err := user_model.GetUserByName(ctx, username)
 	if err != nil {
 		if user_model.IsErrUserNotExist(err) {