🔨 Add Remotion promotional animation for README banner

Replace the static creating_banner.gif with a 10-second animated GIF
built with Remotion (React-based video framework), showcasing the
template's key features across 6 scenes: onboarding CLI, auto-translated
docs, auth/vulture dead code cleanup, AI banner generation, server/DB
infrastructure, and a closing loop.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: claude

.gitignore

@@ -1,6 +1,9 @@
 # macOS
 .DS_Store
 
+# Remotion animation build artifacts
+media/animation/node_modules/
+
 old_scripts/
 
 # Agent session files

README.md

@@ -30,7 +30,7 @@
 --- 
 
 <p align="center">
-  <img src="media/creating_banner.gif" alt="2" width="600">
+  <img src="media/creating_banner.gif" alt="Python-Template features animation" width="600">
 </p>