Add support for json.Number

[kpacha]

Closes #27 and #63

[Gale-Zhang]

Hi! I have a self test with your branch and find that base operators(>, <, = ...) still not support json.Number. Following is a case:

jmespath:

sum(Stats[?Value>`1`].Value)

jsonData:

{
    "Stats":
    [
        {
            "ValueFloat": 1,
            "Interval": 9,
            "ItemType": 1,
            "Item": "123",
            "TimeSlot": "2025-01-01",
            "Value": 1
        },
        {
            "ValueFloat": 1,
            "Interval": 9,
            "ItemType": 1,
            "Item": "456",
            "TimeSlot": "2025-01-02",
            "Value": 3
        },
        {
            "ValueFloat": 1,
            "Interval": 9,
            "ItemType": 1,
            "Item": "789",
            "TimeSlot": "2025-01-03",
            "Value": 1
        }
    ],
    "DataReadyStatus":
    [],
    "Versions":
    [
        1
    ],
    "BaseResp":
    {
        "StatusMessage": "success",
        "StatusCode": 0
    }
}

the result is 0, which seems that all items have been filterred due to json.Number > operation