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.
4. 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.
3. 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 at the Enatega Admin Dashboard Store profile flow, then follow Add New Product → Add-ons → Add option. Verify how existing options are loaded and saved before choosing the appropriate entry points. Done means users can create an option from the dropdown, see it immediately, and find it available in future selections.

Written by the indexing model from the issue text.