feat: Business hour Inbox APIs (#1821)

* feat: Business hour Inbox APIs

spec/models/concerns/out_of_offisable_spec.rb

@@ -16,4 +16,10 @@ shared_examples_for 'out_of_offisable' do
     travel_to '01.11.2020 13:00'.to_datetime
     expect(obj.out_of_office?).to be true
   end
+
+  it 'updates the office hours via a hash' do
+    obj.update_working_hours([{ 'day_of_week' => 1, 'open_hour' => 10, 'open_minutes' => 0,
+                                'close_hour' => 17, 'close_minutes' => 0 }])
+    expect(obj.reload.weekly_schedule.find { |schedule| schedule['day_of_week'] == 1 }['open_hour']).to eq 10
+  end
 end