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

src/favicon/site.webmanifest

@@ -0,0 +1 @@
+{"name":"","short_name":"","icons":[{"src":"/android-chrome-192x192.png","sizes":"192x192","type":"image/png"},{"src":"/android-chrome-512x512.png","sizes":"512x512","type":"image/png"}],"theme_color":"#ffffff","background_color":"#ffffff","display":"standalone"}