chore: Bump version to 1.6.5

Update patch version to reflect recent improvements in Japanese-English file synchronization and template standardization.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: shinpr

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "ai-coding-project-boilerplate",
-  "version": "1.6.4",
+  "version": "1.6.5",
   "description": "TypeScript project boilerplate optimized for Claude Code development with comprehensive development rules, architecture patterns, and quality assurance tools",
   "main": "dist/index.js",
   "keywords": [