refactor: update sidebar.js to use underscore for unused event parameter

refactor: update chat.js to use underscore for unused index parameter

refactor: update multiselect.js to simplify function definitions and improve readability

refactor: update products.js to use underscore for unused variables

refactor: update timeline.js to use underscore for unused timeline variable

fix: update sidebar.hbs to correct navigation links for various pages

- Refactored user management code for better readability and maintainability.
- Added custom filtering for user roles and statuses.
- Implemented bulk actions for selected users with visual feedback.
- Introduced CSV export functionality for user data.
- Integrated confirmation dialogs for delete and save actions using Bootstrap modals.
- Added a simple logger utility for consistent logging across the application.
- Updated user addition process with form handling and success notifications.
- Improved tooltip initialization after DataTable redraws.
- Added ESLint and Prettier ignore files for better code quality management.