Please add documentation for object_concat and object_remove

Hi Amarantha

Can you please add documentation for OBJECT_CONCAT() (New function)
OBJECT_REMOVE()

Examples:
select OBJECT_CONCAT(

{"abc":1}

,

{"def":2}

,

{"fgh":3}

);
{
"requestID": "16982e13-2426-424c-ad90-98104e1d50fd",
"signature":

{ "$1": "object" }

,
"results": [
{
"$1":

{ "abc": 1, "def": 2, "fgh": 3 }

}
],
"status": "success",
"metrics":

{ "elapsedTime": "1.362178ms", "executionTime": "1.342968ms", "resultCount": 1, "resultSize": 122 }

}

select OBJECT_REMOVE(

{"abc":1,"def":2,"fgh":3}

,"def");
{
"requestID": "ddddde59-e648-4ed7-a772-f25e7a522acc",
"signature":

{ "$1": "object" }

,
"results": [
{
"$1":

{ "abc": 1, "fgh": 3 }

}
],
"status": "success",
"metrics":

{ "elapsedTime": "778.603µs", "executionTime": "750.448µs", "resultCount": 1, "resultSize": 96 }

}