feat(org-chart): add core cards and fixed-layout integration

packages/org-chart/src/core/representative-card-asset.ts

@@ -0,0 +1,14 @@
+import url from '../assets/cards/대표자.svg?inline';
+
+export interface RepresentativeCardAsset {
+  size: 'representative';
+  label: string;
+  url: string;
+  width: number;
+  height: number;
+}
+
+/** Separate from department mapping: only the standalone topLeader uses it. */
+export const representativeCardAsset: RepresentativeCardAsset = {
+  size: 'representative', label: '대표자 전용', url, width: 146, height: 74,
+};