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

packages/org-chart/src/data/index.ts

@@ -0,0 +1,6 @@
+export * from './types.js';
+export { validateOrgChartDataset, isSafeImageUrl } from './validate.js';
+export { normalizeOrgChartDataset } from './normalize.js';
+export { calculateSummary } from './summary.js';
+export { snapshotOrgChartDataset } from './snapshot.js';
+export { JsonOrgChartDataSource, OrgChartSourceError, type OrgChartSourceErrorCode, type JsonOrgChartDataSourceOptions } from './source.js';