new action: DeleteLines (#4)

Signed-off-by: Hadi <112569860+anotherhadi@users.noreply.github.com>

leak-utils/misc/merge.go

@@ -0,0 +1,31 @@
+package misc
+
+import (
+	"io"
+	"os"
+
+	"github.com/anotherhadi/eleakxir/leak-utils/settings"
+)
+
+func MergeFiles(lu settings.LeakUtils, outputFile string, inputFiles ...string) error {
+	out, err := os.Create(outputFile)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	for _, inputFile := range inputFiles {
+		file, err := os.Open(inputFile)
+		if err != nil {
+			return err
+		}
+		defer file.Close()
+
+		_, err = io.Copy(out, file)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}