[#682] - Remove Orphaned Tags

[guel-codes]

Overview

• This PR handles removing orphaned tags
• This is connected to PR Enable Tag Merging #904 and pertains to issue Orphaned Tags #682.
• I branched this off of my Enable Tag Merging #904 branch since they were related but I can do a fresh PR if needed.

Updates

• CHANGELOG.rst
• taggit/management/commands/remove_orphaned_tags.py

Manual Test

• Pull code down locally
• pip install -e location_of_your_app/django-taggit
• run python manage.py remove_orphaned_tags inside of your sample_app

Reference

• https://docs.djangoproject.com/en/5.0/howto/custom-management-commands/

Preview

https://www.loom.com/share/0c2b3f0b2dab4d7da9d2943f1520e12e?sid=98d050f0-3046-4aee-b2ec-78945b2a5408

[rtpg]

Rebased this off of main and made sure to use the result of the .delete call to know how many rows were deleted. Looks good! Nice and simple