const data = [
{
   "course": "course1",
   "level": "level1",
   "skill": "skill1"
},
{
   "course": "course1",
   "level": "level1",
   "skill": "skill2"
},
{
   "course": "course2",
   "level": "level1",
   "skill": "skill1"
},
{
   "course": "course2",
   "level": "level1",
   "skill": "skill2"
},
{
   "course": "course2",
   "level": "level2",
   "skill": "skill1"
},

]

[
   {
      "course": "course1",
      "levelwithskills": [
          {
             "name": "level1"
             "skills": [
                {
                   "name": "skill1"
                },
                {
                   "name": "skill2"
                },
             ]
          }
      ]
   },
   {
      "course": "course2",
      "levelwithskills": [
          {
             "name": "level1"
             "skills": [
                {
                   "name": "skill1"
                },
                {
                   "name": "skill2"
                },
             ]
          },
          {
             "name": "level2"
             "skills": [
                {
                   "name": "skill1"
                }
             ]
          }
      ]
   }
]