add user follow feature

spec/routing/user_follows_routing_spec.rb

@@ -0,0 +1,13 @@
+require "rails_helper"
+
+RSpec.describe UserFollowsController, type: :routing do
+  describe "routing" do
+    it "routes to #create" do
+      expect(post: "/user_follows").to route_to("user_follows#create")
+    end
+
+    it "routes to #destroy" do
+      expect(delete: "/user_follows/1").to route_to("user_follows#destroy", id: "1")
+    end
+  end
+end