docs(readme): move SmartArt to Shipped in roadmap

parseDiagramFrame in core already handles SmartArt by loading the
pre-baked drawing XML PowerPoint writes alongside the semantic model
and rendering it as a GroupElement.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: tthallos

README.md

@@ -243,6 +243,7 @@ Exposes a single MCP tool `render_slides` that converts a `.pptx` file path into
 
 - [x] Deck authoring API (`@pagus-kit/builder`) — programmatic IR construction for agent-driven generation
 - [x] Slide transitions and common entrance animations (CSS-based playback)
+- [x] SmartArt support (via pre-rendered diagram drawing XML)
 
 ### Planned
 
@@ -251,7 +252,6 @@ Exposes a single MCP tool `render_slides` that converts a `.pptx` file path into
 - [ ] Vue adapter (`@pagus-kit/vue`)
 - [ ] Full DrawingML property inheritance chain
 - [ ] More preset shape types
-- [ ] SmartArt support
 - [ ] Expanded animation coverage (motion paths, emphasis / exit effects)
 - [ ] Slide notes and speaker view
 - [ ] PPTX export from the builder IR