docs: add demo GIF to README

bitjaru · claude · bitjaru · commit 698a7bb6ff56 · 2026-01-09T13:31:23.000+09:00
🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
diff --git a/README.ko.md b/README.ko.md
@@ -11,6 +11,12 @@
 
 ---
 
+## 🎬 데모
+
+![CodeSyncer Demo](./demo.gif)
+
+---
+
 ## 🤔 문제 상황
 
 실제 프로젝트에서 AI 쓰면 이런 문제 생깁니다:
diff --git a/README.md b/README.md
@@ -11,6 +11,12 @@
 
 ---
 
+## 🎬 Demo
+
+![CodeSyncer Demo](./demo.gif)
+
+---
+
 ## 🤔 The Problem
 
 Working with AI on real projects? You face these issues:
