List categories

{
    "data": [
        {
            "id": 1,
            "slug": "commercial-real-estate",
            "name": "Commercial Real Estate",
            "description": "Investment opportunities in commercial properties",
            "icon": "building",
            "color": "#3B82F6",
            "is_active": true,
            "requires_membership": false,
            "membership_type": "elite",
            "membership_fee": 5000,
            "max_seats": 50,
            "occupied_seats": 12,
            "available_seats": 38,
            "is_seats_full": false,
            "units_count": 5,
            "created_at": "2024-01-15T10:30:00+00:00",
            "updated_at": "2024-01-20T14:45:00+00:00"
        }
    ],
    "links": {
        "first": "http://localhost:8000/api/v1/categories?page=1",
        "last": "http://localhost:8000/api/v1/categories?page=3",
        "prev": null,
        "next": "http://localhost:8000/api/v1/categories?page=2"
    },
    "meta": {
        "current_page": 1,
        "from": 1,
        "last_page": 3,
        "links": [
            {
                "url": "string",
                "label": "string",
                "active": true
            }
        ],
        "path": "http://localhost:8000/api/v1/categories",
        "per_page": 15,
        "to": 15,
        "total": 42
    }
}