curl --request GET \
  --url https://api.ai2fin.com/api/category-sets \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "sets": [
    {
      "id": "<string>",
      "name": "Business Expenses",
      "description": "All business-related expense categories",
      "color": "#3B82F6",
      "icon": "Briefcase",
      "userId": "<string>",
      "isDefault": true,
      "isActive": true,
      "categoryCount": 123,
      "categories": [
        {
          "id": "<string>",
          "name": "<string>",
          "icon": "<string>",
          "color": "<string>",
          "isTaxDeductible": true,
          "taxCategory": "<string>",
          "defaultGstRate": 123
        }
      ],
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "count": 123
}