Add Add-Balance Section

[iampavangandhi]

Description
This section adds balance to the User.js Model. You don't need to set up any payment things just input for the amount and a button for adding also every time generate a unique transaction id (use UUID npm package) and add that in the database (using Transaction.js Model).

Suggestions and Tips
Do clean code with proper comments and variable names to do everything.

Additional context
You have to work in the frontend, backend, and database.