feat(donation): increase minimum custom donation amount to R$ 5.00

- Updated customAmountSchema min value from 0.01 to 5
- Adjusted validation logic and error messages to reflect new minimum
- Modified DONATION_PRODUCTS minAmount for custom tier to 5
- Ensures donations meet the new minimum threshold for processing

types/donation.ts

@@ -39,7 +39,7 @@ export const DONATION_PRODUCTS = {
     name: "Valor Personalizado",
     amount: 0,
     price: 0,
-    minAmount: 0.01, // R$ 0,01
+    minAmount: 5, // R$ 5,00
     maxAmount: 100000, // R$ 100.000,00
   },
 } as const;