docs: update roadmap'26

Author: KamilEmeleev

.storybook/components/Roadmap/data.ts

@@ -326,5 +326,10 @@ export const rows: Rows = [
     stage: '🔵 experimental',
     planned: 'Q1 2026',
   },
-  { component: 'Tree', status: '🛠️ In Progress', planned: 'Q1 2026' },
+  {
+    component: 'Tree',
+    status: '✅ Done',
+    stage: '🔵 experimental',
+    planned: 'Q1 2026',
+  },
 ];