feat(chart): add rendering feature for DrawingML charts

This commit introduces a new rendering feature for various types of charts in the feature registry. The new entry includes support for bar, line, stock, area, scatter, bubble, radar, pie, doughnut, and of pie charts, along with the corresponding module and specification reference.

Author: ggdaltoso

packages/layout-engine/painters/dom/src/features/feature-registry.ts

@@ -76,4 +76,24 @@ export const RENDERING_FEATURES = {
     ],
     spec: '§22.1',
   },
+
+  // ─── Charts ───────────────────────────────────────────────────
+  // @spec ECMA-376 §21.2 (DrawingML Charts)
+  'c:chart': {
+    feature: 'chart',
+    module: './chart',
+    handles: [
+      'c:barChart',
+      'c:lineChart',
+      'c:stockChart',
+      'c:areaChart',
+      'c:scatterChart',
+      'c:bubbleChart',
+      'c:radarChart',
+      'c:pieChart',
+      'c:doughnutChart',
+      'c:ofPieChart',
+    ],
+    spec: '§21.2',
+  },
 } as const;