feat: implement discount and transport features in the quote system

- Added maximum discount settings configurable by the administrator.
- Implemented discount calculations in the quote confirmation process.
- Introduced transport options with associated costs, including handling for exceeding maximum piece limits.
- Updated frontend to display discounts and transport information in the quote summary.
- Created new database migrations for storing discount and transport settings.
- Developed a new Filament page for managing global discount settings.
- Enhanced email templates to include discount and transport details.
- Added tests to ensure proper functionality of discounts and transport calculations.

backoffice/cliente/src/api.js

@@ -20,6 +20,7 @@ async function request(path, options = {}) {
 }
 
 export const api = {
+  config: () => request('/config'),
   getCarrello: (token) => request(`/carrello/${token}`),
   rimuoviItem: (token, itemId) => request(`/carrello/${token}/item/${itemId}`, { method: 'DELETE' }),
   // Se l'utente era loggato nel configuratore, passiamo il suo token al backend così