feat: enhance booking flow with BPF wizard, weekend pricing, and document uploads

- Updated translations for German and English to reflect changes in deposit terminology.
- Modified index.html to implement a new booking flow with a step-by-step wizard for vehicle selection, contact details, and ID verification.
- Added CSS styles for the new booking flow interface, including responsive design and improved input styles.
- Created new database policies and tables for handling customer and lead attachments during the booking process.
- Introduced weekend pricing and daily KM limits for vehicles in the database schema.
- Implemented email-based customer upsert functionality to streamline lead qualification and attachment transfer.

Co-authored-by: Copilot <copilot@github.com>

docker-compose.local.yml

@@ -17,6 +17,7 @@ services:
     volumes:
       - ./supabase/migrations/post-boot.sql:/sql/post-boot.sql:ro
       - ./supabase/migrations/02-leads.sql:/sql/02-leads.sql:ro
+      - ./supabase/migrations/03-booking-flow.sql:/sql/03-booking-flow.sql:ro
 
   kong:
     volumes: