Feat: Out of office autoresponder (#2992)

This change allows the user to enable autoresponder during the out-of-office time.

Fixes: #2035

spec/models/working_hour_spec.rb

@@ -26,4 +26,28 @@ RSpec.describe WorkingHour do
       expect(described_class.today.closed_now?).to be true
     end
   end
+
+  context 'when on friday 12:30pm' do
+    before do
+      Time.zone = 'UTC'
+      create(:working_hour)
+      travel_to '10.09.2021 12:30'.to_datetime
+    end
+
+    it 'is considered to be in business hours' do
+      expect(described_class.today.open_now?).to be true
+    end
+  end
+
+  context 'when on friday 17:30pm' do
+    before do
+      Time.zone = 'UTC'
+      create(:working_hour)
+      travel_to '10.09.2021 17:30'.to_datetime
+    end
+
+    it 'is considered out of office' do
+      expect(described_class.today.closed_now?).to be true
+    end
+  end
 end