feat: dotNotationToObject will delete a key if its value is undefined.

Refactored the code in src/utils.js

The factory function now returns true instead of false in the define block. The function checkValue has been refactored to have a cleaner implementation. The function getValueFromObject now has better handling for nested objects. The function queryDocumentSelector now has better handling for nested queries. Updated the logic for the class name selector. The function queryData was removed as it was unused code.

Author: frankpagan