add `completedPages` in get maze response

[juba0x00]

in /page/maze/{mazeId} endpoint for EXAMPLE the current response

[
  {
    "id": 9,
    "title": "a",
    "description": "description",
    "content": "<p>a</p>",
    "questions": []
  },
  {
    "id": 10,
    "title": "s",
    "description": "description",
    "content": "<p>s</p>",
    "questions": []
  }
] 

the wanted response

[
  {
    "id": 9,
    "title": "a",
    "description": "description",
    "content": "<p>a</p>",
    "questions": []
    "isCompleted": true
  },
  {
    "id": 10,
    "title": "s",
    "description": "description",
    "content": "<p>s</p>",
    "questions": []
    "isCompleted": false
  }
]

@marymfouda

[marymfouda]