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.

package.json

@@ -0,0 +1,20 @@
+{
+    "name": "webtrees-family-navigator-graph",
+    "version": "1.0.0",
+    "private": true,
+    "type": "module",
+    "scripts": {
+        "build": "rollup -c",
+        "watch": "rollup -c --watch",
+        "prepare": "npm run build"
+    },
+    "devDependencies": {
+        "@rollup/plugin-node-resolve": "^16.0.3",
+        "@rollup/plugin-terser": "^0.4.4",
+        "rollup": "^4.9.0"
+    },
+    "dependencies": {
+        "@rollup/plugin-commonjs": "^29.0.2",
+        "d3-selection": "^3.0.0"
+    }
+}