Possibility to apply yourself to the workshop

[litvinets]

Introduction:
Now, every user can apply yourself to the workshop (create application) and later be accepted
Back-end handles it by creating "fake-child" component on their side, so every parent has a card for yourself.

To do:

1. update Child model, add filed isParent: boolean
   

2. do not display isParent card in the children tab, there should be only cards with isParent: false
   
3. update create-application component. Add the second tab, that receives your own card and displays info about yourself
   
   
4. check functionality to apply yourself, the child id should by the id from the card isParent: true ---> childId
5. update child-info-box
   if IsParent: true, then change "Дані дитини" to "Дані користувача". and hide fields that are not relevant to the isParent
   
6. do not display isParent option in the dropdown (there is a bug also [Create Application] - display the whole list of child options #1542)