Add governance onboarding UI flow and reusable wizard primitives

[Copilot]

This adds the planned 5-step governance onboarding flow as a UI-only surface for the governance widget, with light/dark-ready states for identity verification, house selection, house-specific profile forms, stake progress, and success. It also introduces the shared flow primitives needed to support this pattern consistently across widgets.

• Reusable UI primitives

  • Added PageWizard to @goodwidget/ui for horizontal multi-step flows with shared step/data state
  • Added Stepper to @goodwidget/ui for transaction/progress tracking states (pending, active, completed, failed, attention)

• Governance onboarding widget

  • Added new @goodwidget/governance-widget package
  • Implemented a presentational GovernanceOnboardingWidget with:
    • welcome / identity state
    • house selection for Citizenship vs Alignment
    • house-specific profile forms mapped to the planned contract input shape
    • stake progress tracker
    • success state with configurable CTA set
  • Kept runtime concerns out of scope: no transaction wiring, no contract execution, no production data integration

• State contract and flow behavior

  • Added explicit props/state for:
    • selected house
    • identity status
    • profile draft + field errors
    • stake amount label
    • transaction step statuses
    • final action configuration
  • Preserved selection across later steps in the interactive flow

• Storybook and smoke coverage

  • Added governance onboarding stories under examples/storybook/src/stories/governance-widget/
  • Covered both review contexts and key states:
    • injected and custodial wallet shells
    • unverified / verified welcome
    • house selection
    • citizenship ready profile
    • alignment validation/error profile
    • failed stake progress
    • success state
  • Added widget smoke coverage and screenshot evidence under tests/widgets/governance-widget/

• Example

  <GovernanceOnboardingWidget
    currentStepId="profile"
    identityStatus="verified"
    initialHouse="alignment"
    stakeAmountLabel="250 G$"
    initialProfileDraft={{
      name: 'Solar Commons',
      projectWebpage: 'https://solar.example',
    }}
    initialFieldErrors={{
      missionStatement: 'Mission statement is required',
      distributionStrategy: 'Distribution strategy is required',
    }}
  />

[L03TJ3]

@copilot the skills folder commited should not. please remove

[Copilot]

@copilot the skills folder commited should not. please remove

Addressed in commit 05a6658: removed the committed .agents/skills folder from this branch.