Update version to 1.1.0 and enhance documentation

- Bumped version from 1.0.1 to 1.1.0 in package.json and UI
- Updated USER_GUIDE.md with new features in v1.1.0
- Enhanced DEVELOPERS.md with:
  - Information about reusable components (ActionButton, Section)
  - Documentation for type-safe utilities
  - Code examples for performance optimizations
  - Updated best practices
  - Added information about the improved project structure

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

docs/USER_GUIDE.md

@@ -212,4 +212,12 @@ If you encounter issues not covered in this guide, contact your IT department or
 
 ## Version Information
 
-This user guide is for Edison PowerPoint Add-in v1.0.0.
+This user guide is for Edison PowerPoint Add-in v1.1.0.
+
+### What's New in v1.1.0
+
+* **Performance Improvements** - Faster operations especially when working with multiple shapes
+* **Enhanced Stability** - Improved error handling and recovery
+* **Better UI Experience** - More responsive interface with improved scrolling
+* **Accessibility Enhancements** - Better support for screen readers and keyboard navigation
+* **Code Quality** - Improved TypeScript typing for increased reliability