Customization of Django Admin Panel (Layout + additional functionality)

A template for the Admin panel has been developed and integrated, and the templates for additional applications have also been modified.

Additional functionality:
- The functionality for manual editing of the main menu of the Admin panel has been added. This functionality includes specifying the name of the dropdown list and indicating models for the list of child elements. If a parent menu item is not specified, a regular menu is added instead of a dropdown menu. This solution allows hiding unnecessary items from the menu list, enabling the use of the standard framework functionality for editing elements of related models.
- The functionality for generating tabs for the model object editing page has been added.
- The functionality for generating object viewing pages for the model has been added, where it is possible to view the object in a two-column table format: the first column is the name of the model field, and the second column is the value of the field.