Add create crm contact component

What does this MR do and why?

#2256

This MR adds a vue component for creating crm contacts through the UI 🎉

Screenshots or screen recordings

How to set up and validate locally

1. Enable the feature flag

   Feature.enable(:customer_relations)

2. Navigate to a group and select Customer relations -> Contacts from the left sidebar (or use http://gdk.test:3000/groups/flightjs/-/crm/contacts)
3. Select New contact in the top left
4. Profit!