update file structure [ci skip]

tools/files/files.go

@@ -0,0 +1,30 @@
+package files
+
+import (
+	"io"
+	"os"
+)
+
+// CopyFile is used to copy a file
+func CopyFile(old, new string) error {
+	// Open the file and create a new one
+	r, err := os.Open(old)
+	if err != nil {
+		return err
+	}
+	defer r.Close()
+
+	w, err := os.Create(new)
+	if err != nil {
+		return err
+	}
+	defer w.Close()
+
+	// Copy the content
+	_, err = io.Copy(w, r)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}