feat: conversion to typescript for tutorials.js file

[niladrix719]

Is your feature request related to a problem? Please describe.

Currently the tutorials.js file is written is javascript but can be converted to typescript for type safety and better developer experience.

Describe the solution you'd like

Conversion of file to typescript and using:-

1. interfaces for the objects
2. addition of ? operator for type safety
3. using as HTMLElement for accessing properties of html elements

Are you working on this? (Yes/No)

Yes