Add SetupProgressIndicator component that shows users their current
position in the 4-step onboarding journey: Name → Beneficiary →
Equipment → Connect. The indicator displays:
- Visual progress bar with percentage fill
- Step circles with icons showing completed/current/pending status
- Current step label with "Step X of 4" text
Integrate the indicator into all four auth screens:
- enter-name.tsx (Step 1)
- add-loved-one.tsx (Step 2)
- purchase.tsx (Step 3)
- activate.tsx (Step 4)
Also add @expo/vector-icons mock to jest.setup.js for testing.
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Co-Authored-By: Claude <noreply@anthropic.com>