Move Assignments under Bubble

Since that what we are assigning

app/controllers/bubbles/assignments_controller.rb

@@ -1,4 +1,4 @@
-class AssignmentsController < ApplicationController
+class Bubbles::AssignmentsController < ApplicationController
   include BubbleScoped
 
   def new

config/routes.rb

@@ -59,9 +59,9 @@ Rails.application.routes.draw do
         resource :recover
         resources :stagings
         resource :watch
+        resources :assignments
       end
 
-      resources :assignments
       resources :taggings
     end
   end

test/controllers/bubbles/assignments_controller_test.rb

@@ -1,6 +1,6 @@
 require "test_helper"
 
-class AssignmentsControllerTest < ActionDispatch::IntegrationTest
+class Bubbles::AssignmentsControllerTest < ActionDispatch::IntegrationTest
   setup do
     sign_in_as :kevin
   end