feat: add render_mindmap a2ui tool with d3-hierarchy layout

package.json

@@ -43,6 +43,8 @@
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.6.1",
     "@types/chokidar": "^1.7.5",
+    "@types/d3-hierarchy": "^3.1.7",
+    "@types/d3-shape": "^3.1.8",
     "@types/node": "^25.2.3",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -95,6 +97,8 @@
     "ai": "^6.0.105",
     "chokidar": "^5.0.0",
     "d3-cloud": "^1.2.8",
+    "d3-hierarchy": "^3.1.2",
+    "d3-shape": "^3.2.0",
     "date-fns": "^4.1.0",
     "drizzle-orm": "^0.45.1",
     "dropbox": "^10.34.0",