chore(release): prepare for 4.3.0 release

- Finalize CHANGELOG.md for version 4.3.0
- Document new management commands and improvements
- Set release date to 2025-07-12

Author: oliverandrich

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 4.3.0 (2025-07-12)
+
 ### 🎯 New Features
 - **Interactive setup command**: `python manage.py tailwind setup` for guided configuration
 - **Configuration viewer**: `python manage.py tailwind config` to inspect current settings