Add family moniker selection and dynamic UI labels (#981)

* Add family moniker selection and dynamic UI labels

Introduce a Family moniker persisted in the database with allowed values Family/Group, add required onboarding selection for it, and thread moniker-aware copy through key user-facing views and locales. Also add helper methods and tests for onboarding form presence and family moniker behavior.

* Small copy edits/change moniker question order

* Conditional Group/Family onboarding flow fixes

* Fix label

* Grouping of fields

* Profile Info page Group/Family changes

* Only admins can change Group/Family moniker

* Repetitive defaults

* Moniker in Account model

* Moniker in User model

* Auth fix

* Sure product is also a moniker

---------

Signed-off-by: Juan José Mata <juanjo.mata@gmail.com>

test/controllers/onboardings_controller_test.rb

@@ -17,6 +17,16 @@ class OnboardingsControllerTest < ActionDispatch::IntegrationTest
     assert_select "h1", text: /set up your account/i
   end
 
+
+  test "onboarding setup includes required moniker selection" do
+    get onboarding_url
+    assert_response :success
+
+    assert_select "input[name='user[family_attributes][moniker]'][value='Family'][required]"
+    assert_select "input[name='user[family_attributes][moniker]'][value='Group'][required]"
+    assert_select "p", text: /Will be using Sure with/i
+  end
+
   test "should get preferences" do
     get preferences_onboarding_url
     assert_response :success