feat(samples): add go examples, secure signing and send a memo

_code-samples/secure-signing/go/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/Peersyst/xrpl-go/pkg/crypto"
+	"github.com/Peersyst/xrpl-go/xrpl/transaction"
+	"github.com/Peersyst/xrpl-go/xrpl/transaction/types"
+	"github.com/Peersyst/xrpl-go/xrpl/wallet"
+)
+
+func main() {
+	w, err := wallet.New(crypto.ED25519())
+	if err != nil {
+		panic(err)
+	}
+
+	p := &transaction.Payment{
+		BaseTx: transaction.BaseTx{
+			Account: types.Address(w.GetAddress()),
+			Fee:	types.XRPCurrencyAmount(13),
+			Sequence: 1,
+			Flags:    2147483648,
+			LastLedgerSequence: 7835923,
+		},
+		Destination: "rPT1Sjq2YGrBMTttX4GZHjKu9dyfzbpAYe",
+		Amount:      types.XRPCurrencyAmount(10000),
+		DeliverMax:  types.XRPCurrencyAmount(10000), 
+	}
+
+	flattenedTx := p.Flatten()
+
+	fmt.Println("Payment object created:", flattenedTx)
+
+	signedTx, txHash, err := w.Sign(flattenedTx)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println("Transaction signed successfully:", signedTx)
+	fmt.Println("Transaction hash:", txHash)
+}