improvement for readCSV file and code refactoring

[Virous77]

1. Used fs/promises for promise-based file operations.
2. Improved the construction of the beginSQLInsert statement.
3. Extracted the validation logic into a separate function (validateRow).
4. Refactored file existence check into a separate function.
5. Added .nvmrc file

[servesh-chaturvedi]

Hey could you modify your vscode settings so that no unnecessary settings like single quotes to double or tab spaces appear? That ways, it is helpful to check exact changes🙂

[Virous77]

Hey could you modify your vscode settings so that no unnecessary settings like single quotes to double or tab spaces appear? That ways, it is helpful to check exact changes🙂

sure will look into that:)