Initial commit: webtrees Family Navigator Graph sidebar module

SVG-based sidebar widget displaying immediate family relationships
(parents, siblings, spouses, children) with compact card layout,
multi-spouse routing, wrapped rows, and ancestor/descendant indicators.

resources/js/modules/index.js

@@ -0,0 +1,9 @@
+/**
+ * Family Navigator Graph — entry point.
+ *
+ * Reads embedded data from the sidebar and initializes the compact chart.
+ */
+import Chart from "./lib/chart.js";
+
+// Expose for sidebar inline script
+window.FamilyNavGraphChart = Chart;