feat(customers): add DTOs for individual and legal customer creation

- Created CreateCustomerIndividualDto for individual customer data with fields: first_name, last_name, national_code, postal_code, is_favorite, and economic_code.
- Created CreateCustomerLegalDto for legal customer data with fields: company_name, economic_code, registration_number, and postal_code.

prisma/migrations/20260224080728_init/migration.sql

@@ -0,0 +1,20 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `description` on the `sales_invoices` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE `customers` MODIFY `type` ENUM('INDIVIDUAL', 'LEGAL', 'UNKNOWN') NOT NULL;
+
+-- AlterTable
+ALTER TABLE `sales_invoice_items` ADD COLUMN `notes` TEXT NULL;
+
+-- AlterTable
+ALTER TABLE `sales_invoice_payments` MODIFY `payment_method` ENUM('TERMINAL', 'CASH', 'SET_OFF', 'CARD', 'BANK', 'CHECK', 'OTHER') NOT NULL;
+
+-- AlterTable
+ALTER TABLE `sales_invoices` DROP COLUMN `description`,
+    ADD COLUMN `invoice_date` TIMESTAMP(0) NULL DEFAULT CURRENT_TIMESTAMP(0),
+    ADD COLUMN `notes` TEXT NULL,
+    ADD COLUMN `unknown_customer` JSON NULL;