[Feature] Implement Group GraphQL Model And CRUD Resolvers In Backend

Created by: Tirokk

Feature Request

Implement group GraphQL model and CRUD resolvers.

• relates #5059 (closed)

Todo

• GraphQL
  • add group settings ( details see https://github.com/Ocelot-Social-Community/Ocelot-Social/issues/5059#user-content-group-settings )
    • owner/admin
    • name (title)
    • slug-name
    • about (goal)
    • description:
      • minimal 100 chars
    • group type
    • action radius
    • location
    • categories: 1-3
    • add relation CREATED
  • rename UserGroup to UserRole
  • define resolver for:
    • CreateGroup
      • error on name length, see frontend
    • Group
    • UpdateGroup
    • DeleteGroup, see #5388
• seeding:
  • seed a group