Move Assignments under Bubble

Since that what we are assigning

test/controllers/bubbles/assignments_controller_test.rb

@@ -0,0 +1,25 @@
+require "test_helper"
+
+class Bubbles::AssignmentsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in_as :kevin
+  end
+
+  test "new" do
+    get new_bucket_bubble_assignment_url(buckets(:writebook), bubbles(:logo))
+
+    assert_response :success
+  end
+
+  test "create" do
+    assert_changes "bubbles(:logo).assigned_to?(users(:david))", from: false, to: true do
+      post bucket_bubble_assignments_url(buckets(:writebook), bubbles(:logo)), params: { assignee_id: users(:david).id }, as: :turbo_stream
+    end
+    assert_response :success
+
+    assert_changes "bubbles(:logo).assigned_to?(users(:david))", from: true, to: false do
+      post bucket_bubble_assignments_url(buckets(:writebook), bubbles(:logo)), params: { assignee_id: users(:kevin).id }, as: :turbo_stream
+    end
+    assert_response :success
+  end
+end