BE add endpoints for booking

3 sp 

FE needs:
enpoint for Booking:
Create Booking. 
Recieved data:
 USER:
1. full name
2. address
3. phone
4. optinal: email
PET:
1. PetType
2. Diseases
3. optional: name, weight, photo
SEAT:
1. id

Endpoint for Seat searching:
returns Seats
recieved data:
1. Hotel id
2. PetType
3. Rent from, rent to
