feat(storybook): add BaseNode V2 story for iterative design comparison

Duplicates the BaseNode story suite under a new 'Components/BaseNode V2'
title so the team can click between before/after in Storybook while
iterating on BaseNode improvements.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dbacomputer

apps/storybook/.storybook/preview.tsx

@@ -165,7 +165,7 @@ const preview: Preview = {
             '*',
           ],
           'Canvas',
-          ['Components', ['All Components', '*'], '*'],
+          ['Components', ['All Components', 'BaseNode', 'BaseNode V2', '*'], '*'],
         ],
       },
     },