Android Device Manager v1.2.0

feat: Add comprehensive File Manager with advanced features (v1.1.0)

## Major Features Added:

### File Manager
- Full filesystem navigation with root access support
- Drag & drop file upload with real-time progress tracking
- Multiple file download with batch operations
- Context menu with file operations (rename, delete, download)
- Real-time search and filtering within directories
- SQLite database file integration - opens .db files in Terminal
- Column sorting by name, size, and modification date
- Navigation history with back/forward functionality
- Symlink support with automatic resolution

### UI Enhancements
- Progress window for file uploads showing:
  - Upload speed in MB/s
  - Progress percentage and time remaining
  - Bytes transferred counter
- Context-sensitive right-click menus
- Resizable columns with text truncation
- Configurable download directory in preferences

### Technical Improvements
- Root file download via temporary copy mechanism
- Persistent shell session reuse for performance
- Thread-safe upload monitoring
- Proper error handling and user feedback

### Documentation Updates
- Added FILE_MANAGER_FEATURES.md with complete feature list
- Updated README files (EN/TR) with new features
- Updated ROADMAP.md with v1.1.0 release notes
- Removed outdated planning documents

### Version Bump
- Version: 1.0.1 → 1.1.0
- Build: 101 → 110

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

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