feat: Add Formbricks integration, update forms with webhooks, enhance navigation

- Integrate @formbricks/js for future surveys (FormbricksProvider)
- Add WebhookForm component for unified form submission (contact/franchise/membership)
- Update contact form with reason dropdown field
- Update franchise form with new fields: estado, ciudad, socios checkbox
- Update franchise benefits: manuals, training platform, RH system, investment $100k
- Add Contacto link to desktop/mobile nav and footer
- Update membership form to use WebhookForm with membership_id select
- Update hero buttons to use #3E352E color consistently
- Refactor contact/franchise pages to use new hero layout and components
- Add webhook utility (lib/webhook.ts) for parallel submission to test+prod
- Add email receipt hooks to booking endpoints
- Update globals.css with new color variables and navigation styles
- Docker configuration for deployment

.env.example

@@ -21,5 +21,14 @@ TWILIO_WHATSAPP_FROM=whatsapp:+14155238886
 NEXTAUTH_URL=http://localhost:3000
 NEXTAUTH_SECRET=your-nextauth-secret
 
+# Email Service (Resend)
+RESEND_API_KEY=re_xxxxxxxxxxxxxxxxxxxxxxxxxxxx
+
 # App
 NEXT_PUBLIC_APP_URL=http://localhost:3000
+
+# Optional: Redis para caching
+REDIS_URL=redis://redis:6379
+
+# Optional: Analytics
+NEXT_PUBLIC_GA_ID=G-XXXXXXXXXX