add fp2 sample

csharp-fp2/Program.cs

@@ -0,0 +1,18 @@
+using CsharpFp2.Application;
+using CsharpFp2.Domain;
+using CsharpFp2.Infrastructure;
+
+Console.WriteLine("[csharp-fp2] Starting withdraw money demo...");
+
+var (loadAccount, saveAccount) = InMemoryAccount.Create();
+var withdrawMoney = AccountApplication.CreateWithdrawMoney(loadAccount, saveAccount);
+
+var accountId = Guid.NewGuid();
+Console.WriteLine($"[csharp-fp2] Seeding account {accountId} with opening balance 200.00");
+saveAccount(new Account(accountId, new Money(200m)));
+
+decimal amount = 100m;
+Console.WriteLine($"[csharp-fp2] Executing withdrawal {amount:0.00} from account {accountId}");
+withdrawMoney(accountId, amount);
+
+Console.WriteLine("[csharp-fp2] Demo completed.");