Restore TestimonyCalloutSection to homepage

[HDC432]

Summary

Closes #2124, restores the TestimonyCalloutSection to the homepage below the first section with the statehouse graphic.

Checklist

• On the frontend, I've made my strings translate-able.
• If I've added shared components, I've added a storybook story.
• I've made pages responsive and look good on mobile.
• If I've added new Firestore queries, I've added any new required indexes to firestore.indexes.json (Please do not only create indexes through the Firebase Web UI, even though the error messages may reccommend it - indexes created this way may be obliterated by subsequent deploys)

Screenshots

Steps to test/reproduce

1. Go to the home page
2. Scroll down below the statehouse graphic
3. Verify the "What people are saying..." section appears with 4 recent testimonies
4. Verify the "Browse All Testimony" button links to /testimony
5. On mobile, verify testimonies display as a carousel

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Project	Deployment	Actions	Updated (UTC)
maple-dev	Ready	Preview, Comment	May 20, 2026 2:46am