Add control gallery sample and roadmap documentation

- Add comprehensive ControlGallery sample app with 12 pages
  demonstrating all 35+ controls
- Add detailed ROADMAP.md with version milestones
- Add README placeholders for VSIX icons and template images
- Sample pages include: Home, Buttons, Labels, Entry, Pickers,
  Sliders, Toggles, Progress, Images, CollectionView, CarouselView,
  SwipeView, RefreshView

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -0,0 +1,96 @@
+# OpenMaui Linux Platform Roadmap
+
+This document outlines the development roadmap for the OpenMaui Linux platform.
+
+## Version 1.0 (Current - Preview)
+
+### Completed Features ✅
+
+| Feature | Status | Description |
+|---------|--------|-------------|
+| Core Control Library | ✅ Complete | 35+ controls including Button, Label, Entry, etc. |
+| SkiaSharp Rendering | ✅ Complete | Hardware-accelerated 2D graphics |
+| X11 Support | ✅ Complete | Full X11 display server integration |
+| Platform Services | ✅ Complete | Clipboard, file picker, notifications, etc. |
+| Accessibility (AT-SPI2) | ✅ Complete | Screen reader support |
+| Input Methods | ✅ Complete | IBus and XIM support |
+| High DPI Support | ✅ Complete | Automatic scale factor detection |
+| Drag and Drop | ✅ Complete | XDND protocol implementation |
+| Global Hotkeys | ✅ Complete | System-wide keyboard shortcuts |
+| XAML Support | ✅ Complete | Standard .NET MAUI XAML syntax |
+| Project Templates | ✅ Complete | Code and XAML-based templates |
+| Visual Studio Extension | ✅ Complete | Project templates and launch profiles |
+
+## Version 1.1 (Next Release)
+
+### In Progress 🚧
+
+| Feature | Priority | Description |
+|---------|----------|-------------|
+| Complete Wayland Support | High | Full Wayland compositor support |
+| XAML Hot Reload | High | Live XAML editing during debugging |
+| Performance Optimizations | Medium | Rendering and memory improvements |
+
+### Planned 📋
+
+| Feature | Priority | Description |
+|---------|----------|-------------|
+| Hardware Video Acceleration | Medium | VA-API/VDPAU integration |
+| Live Visual Tree | Medium | Debug tool for inspecting UI hierarchy |
+| Theming Improvements | Medium | Better system theme integration |
+
+## Version 1.2 (Future)
+
+### Planned 📋
+
+| Feature | Priority | Description |
+|---------|----------|-------------|
+| GTK4 Interop Layer | Low | Native GTK dialog support |
+| WebView Control | Medium | Embedded web browser support |
+| Maps Integration | Low | OpenStreetMap-based mapping |
+| Printing Support | Medium | CUPS printing integration |
+
+## Version 2.0 (Long-term)
+
+### Vision 🔮
+
+| Feature | Description |
+|---------|-------------|
+| Vulkan Rendering | Next-gen graphics API support |
+| Flatpak Packaging | Easy distribution via Flatpak |
+| Snap Packaging | Ubuntu Snap store support |
+| AppImage Support | Portable Linux app format |
+| Multi-window Support | Multiple top-level windows |
+| System Tray Menus | Rich tray icon interactions |
+
+## Contributing
+
+We welcome contributions! Priority areas:
+
+1. **Wayland Support** - Help complete the Wayland backend
+2. **Testing** - Integration tests on various distributions
+3. **Documentation** - API docs and tutorials
+4. **Controls** - Additional control implementations
+5. **Samples** - Real-world demo applications
+
+See [CONTRIBUTING.md](../CONTRIBUTING.md) for details.
+
+## Milestones
+
+| Milestone | Target | Status |
+|-----------|--------|--------|
+| v1.0.0-preview.1 | Q1 2025 | ✅ Released |
+| v1.0.0-preview.2 | Q1 2025 | ✅ Released |
+| v1.0.0 | Q2 2025 | 🚧 In Progress |
+| v1.1.0 | Q3 2025 | 📋 Planned |
+| v1.2.0 | Q4 2025 | 📋 Planned |
+
+## Feedback
+
+- GitHub Issues: https://github.com/open-maui/maui-linux/issues
+- Discussions: https://github.com/open-maui/maui-linux/discussions
+
+---
+
+*Last updated: January 2025*
+*Copyright 2025 MarketAlly LLC*