统计数组中的元素个数

type Simple1 = CountElementNumberToObject<[]> // return {}
type Simple2 = CountElementNumberToObject<[1,2,3,4,5]> 
/*
 return {
  1: 1,
  2: 1,
  3: 1,
  4: 1,
  5: 1
}
*/
type Simple3 = CountElementNumberToObject<[1,2,3,4,5,[1,2,3]]> 
/*
 return {
  1: 2,
  2: 2,
  3: 2,
  4: 1,
  5: 1
}
*/