docs(readme): add live PyPI version badge + family-consistent badge row (#680)

The README led with only a static "Latest on Django Packages" badge that
rendered as a broken-looking `PyPI | django-admin-react-tags`. Replace it
with the same badge row the sibling repos use: live PyPI version
(`pypi/v`), Python versions (`pypi/pyversions`), Django versions, MIT
license, and the Django Packages link (with the single-dash → `--` shields
escaping fixed). All five URLs curl-probed 200.

Co-authored-by: Martin Castro Laminrs <mcastro@laminr.ai>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: 3 people

README.md

@@ -1,6 +1,10 @@
 # django-admin-react
 
-[![Latest on Django Packages](https://img.shields.io/badge/PyPI-django--admin--react--tags-8c3c26.svg)](https://djangopackages.org/packages/p/django-admin-react/)
+[![PyPI version](https://img.shields.io/pypi/v/django-admin-react.svg)](https://pypi.org/project/django-admin-react/)
+[![Python versions](https://img.shields.io/pypi/pyversions/django-admin-react.svg)](https://pypi.org/project/django-admin-react/)
+[![Django versions](https://img.shields.io/badge/Django-5.0%20%7C%205.1%20%7C%205.2%20%7C%206.0-44b78b.svg)](https://www.djangoproject.com/)
+[![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+[![Latest on Django Packages](https://img.shields.io/badge/Django%20Packages-django--admin--react-8c3c26.svg)](https://djangopackages.org/packages/p/django-admin-react/)
 
 A drop-in **React single-page admin** for any Django 5+ project. Same
 `pip install`, same `INSTALLED_APPS`, same `urls.py include()` — and