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

examples/org-chart-react/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="ko">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" href="data:," />
+    <title>HM OrgChart React Consumer</title>
+  </head>
+  <body>
+    <main id="root"></main>
+    <script type="module" src="./app.tsx"></script>
+  </body>
+</html>