feat(root): scaffold Django project with djinit

Add initial project skeleton using djinit to enable rapid development, CI integration, and deployment setup.

New Features
- Create .djinit with unified project structure and Tailwind/HTMX enabled.
- Add .env.sample with default Django, database, and frontend URLs.
- Generate comprehensive .gitignore covering Python, Django, OS, and secret files.
- Provide Procfile for Gunicorn web process and release migrations.
- Scaffold README.md with project overview and features.
- Add manage.py enhanced with environ for .env support.
- Initialize pyproject.toml with modern metadata and ruff linting config.
- Add requirements.txt mirroring dependencies.
- Include runtime.txt pinning Python 3.13.
- Update uv.lock to lock dependency versions.

Enhancements
- Upgrade to latest Django 6.0.5 and DRF ecosystem.
- Configure ruff with line-length 88 and isort settings.
- Use gunicorn with optimal worker configuration.
- Include dj-database-url and psycopg binary for robust PostgreSQL connectivity.

Bug Fixes
- None.

requirements.txt

@@ -0,0 +1,13 @@
+django>=6.0.5
+django-environ>=0.13.0
+django-jazzmin==3.0.1
+djangorestframework>=3.17.1
+djangorestframework-simplejwt>=5.5.1
+drf-spectacular>=0.29.0
+django-cors-headers>=4.9.0
+whitenoise>=6.12.0
+psycopg[binary]
+dj-database-url>=3.1.2
+gunicorn>=26.0.0
+django-tailwind-cli>=4.6.2
+django-htmx>=1.27.0