Add testimonials section and Q&A submit CTA; v1.0.8

- Testimonials: new Testimonial type, CMS field, admin UI under About,
  and TestimonialsSection rendered on homepage and About page (hidden when empty)
- Q&A: "Submit a Question →" CTA at bottom of Q&A page linking to /contact

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "1.0.7",
+  "version": "1.0.8",
   "type": "module",
   "scripts": {
     "dev": "vite",