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

packages/org-chart/src/index.ts

@@ -0,0 +1,5 @@
+export * from './data/index.js';
+export { createOrgChart } from './core/index.js';
+export type { OrgChartDisplayMode, OrgChartEmployeeClickContext, OrgChartHandle, OrgChartOptions, OrgChartOrganizationLinks, OrgChartState } from './core/types.js';
+export { createOrgChartTree, createPositionSummary, createAffiliationSummary, createStatusSummary } from './components.js';
+export type { OrgChartSummaryComponentOptions } from './components.js';