[change] Migrate from django-admin-autocomplete-filter to dalf #582

Replace the unmaintained and license-incompatible django-admin-autocomplete-filter
with django-admin-list-filter (dalf), an actively maintained MIT-licensed alternative
that uses Django's native admin autocomplete infrastructure.

Changes:
- Updated dependencies in setup.py to use dalf>=0.7.0,<1.0.0
- Rewrote AutocompleteFilter to extend DALFRelatedFieldAjax
- Simplified AutocompleteJsonView to use Django's native implementation
- Added robust error handling for invalid filter parameters (e.g., invalid UUIDs)
- Updated admin classes to inherit from DALFModelAdmin
- Modified filter usage from custom classes to tuple format
- Updated documentation and templates
- Fixed reverse relation support in autocomplete view

Fixes #582

Author: SAMurai-16