curl --location --request POST '/category/insertAfter?parentId=1706976554962857985&categoryName=UDP协议'
{
"code": 200,
"msg": "success",
"data": {
"categoryId": "1706977163560517634",
"categoryName": "UDP协议",
"parentId": "1706976554962857985",
"leftIndex": 42,
"rightIndex": 43
}
}