Allow to register contacts

[LucileDT]

Context

Non profits often are in contact with people and organizations. We need to save them to easily access their information when needed.

Todo

• [ ] save "contacts" information
  • [ ] fields:
  • [ ] abstract getName()
  • [ ] address
  • [ ] phoneNumber
  • [ ] email address
  • [ ] save natural persons information
  • [ ] firstname
  • [ ] lastname
  • [ ] mobilePhoneNumber
  • [ ] save companies information
  • [ ] name
  • [ ] siret
  • [ ] save non profits information
  • [ ] name
  • [ ] website
• [ ] have a list of "contacts"