Added signal handler for the interrupt signal

- Subscribing to an interrupt signal handler allows graceful shutdown of
  the program.
- Use exit code 130 for interrupt signals.

Fixes: https://github.com/kubescape/kubescape/issues/1476

Signed-off-by: VaibhavMalik4187 <vaibhavmalik2018@gmail.com>

main.go

@@ -1,11 +1,29 @@
 package main
 
 import (
+	"os"
+	"os/signal"
+	"syscall"
+
 	logger "github.com/kubescape/go-logger"
 	"github.com/kubescape/kubescape/v3/cmd"
 )
 
 func main() {
+	// Capture interrupt signal
+	signalChan := make(chan os.Signal, 1)
+	signal.Notify(signalChan, os.Interrupt, syscall.SIGTERM)
+
+	// Handle interrupt signal
+	go func() {
+		<-signalChan
+		// Perform cleanup or graceful shutdown here
+		logger.L().StopError("Received interrupt signal, exiting...")
+
+		// Exit the program with proper exit code for SIGINT
+		os.Exit(130)
+	}()
+
 	if err := cmd.Execute(); err != nil {
 		logger.L().Fatal(err.Error())
 	}