feat: Groups (Map-Mode): Backend API

[resah]

This is part of the feature "Groups":
To visualize teams, or as we call it at AOE "circles", it should be possible to define groups. To accommodate for different use cases, there are two different variants for grouping. This feature is part of "Map groups (area)":
Draw an area in a specific location (map), which is assign a name (and maybe other properties).
Use cases: team areas, event spaces, children area, ...

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This contains CRUD for groups

• Endpoints
  • GET /api/groups/ - Get all groups
  • POST /api/groups/ - Create a new group
  • GET /api/groups/:id - Get group data by ID
  • PUT /api/groups/:id - Update a group
  • DELETE /api/groups/:id - Delete a group
• Entity Group
  • id: string (UUID)
  • name: string
  • description: string
  • coordinates: Coordinate[]
• ValueObject Coordinate ?
  • lat: number
  • lng: number