- Move HelperText under Components/Forms.
- Add explicit storySort.order for Forms (primitive → composed → grouped
  → date/time → patterns → helper) and Menu (foundation → trigger →
  composed → advanced) so the sidebar reads in usage order rather than
  alphabetically.
- Bump package version to 0.2.0.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>