create an add expense list endpoint

[kelanialiyu]

this creates and persists expense list using with the format

{
id:""
author_id:"",
title:"".
Item:[
  {
  name : "",
  unit_price : "",
  quantity : ""
  },
],
total_price : "",
description : ""
status : "",
admin_id : "",
date: date(),
room_id:"",
plugin_id:"",
organisation_id:""
}

[themobileprof]

Would like to handle this