feat: implement tax calculations for subscription and SMS wallet payments

- Updated SubscriptionPeriod interface to include tax-related fields: tax_percent, tax_rials, and payable_rials.
- Modified payment API documentation to reflect changes in tax handling for subscriptions and SMS wallet charges.
- Adjusted PaymentController to calculate payment amounts based on subscription period details instead of client input.
- Enhanced PaymentManager to handle net amounts for SMS wallet charges, ensuring tax is not credited to the wallet.
- Created PaymentTaxCalculator and SubscriptionTaxCalculator services to manage tax calculations consistently across payment types.
- Added tests for tax calculations in both subscription and SMS wallet contexts, ensuring correct behavior with and without tax enabled.
- Updated frontend components to display tax information appropriately during payment processes.

assets/admin/hooks/usePaymentConfig.ts

@@ -11,6 +11,8 @@ interface PaymentConfig {
   test_mode: boolean;
   appointment_fee_rials: number;
   gateways: PaymentGatewayInfo[];
+  /** نرخ مالیات اشتراک و شارژ کیف پول؛ صفر یعنی خاموش. */
+  tax_percent: number;
 }
 
 export function usePaymentConfig() {
@@ -22,5 +24,6 @@ export function usePaymentConfig() {
   return {
     isTestMode: data?.data?.test_mode ?? false,
     gateways: data?.data?.gateways ?? [],
+    taxPercent: data?.data?.tax_percent ?? 0,
   };
 }