add: feedback validations

[Aaryan Kothari]

1. vitEmail shall end with @vitstudent.ac.in
2. gameRating shall be 1-5
3. if (isVITStudent == true) { vitEmail and regNO } shall be required.

[Aaryan Kothari]

in case feedback already filled:

currentResponse:

{
    "success": true,
    "data": {
        "message": "feedback Sent"
    }
}

change to:

{
   "success": false,
   "data": {  },
    "message": "feedback Sent"
}

[Shubham Palriwala]

@varunmurpani @Sidarth-V @anshulagx somebody take this up

[Aarush Bhat]

Wont fix