Enatega Admin Dashboard: Allow users to Add new Options from dropdown in Addons.

**Describe the bug**
Currently, users can only select from predefined options in the Addons dropdown. This enhancement will allow users to add new options directly from the dropdown while adding a products addons.
**To Reproduce**
Steps to reproduce the behavior:

1. Go to 'Enatega Admin Dashboard'
2. Go to Store profile.
3. Add a new Product , while adding variations now click on Add-ons. Add option screen will show up now see at bottom an input field with name options.
5. Create there an option , to add some new options which will show up in the dropdown.

Expected behavior

1. A new "Add New Option" button or input field should be available within the dropdown.
2. When a user enters a new option, it should be saved and immediately appear in the dropdown.

The new option should be persisted in the database so it is available for future selections.

Desktop (please complete the following information):

OS: [e.g. Windows]
Browser [e.g. Chrome]
Version [e.g. Latest]

Start in the Enatega Admin Dashboard at Store profile, then follow the add-product flow to the Add-ons and Add option screens. Trace how dropdown options are loaded and saved, and verify that a newly entered option appears immediately and remains available after reopening the product flow.

Written by the indexing model from the issue text.