refactor: change default output directory

internal/utils/dir.go

@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"fmt"
+	"os"
+)
+
+func EnsureDir(path string) error {
+	info, err := os.Stat(path)
+	if os.IsNotExist(err) {
+		return os.MkdirAll(path, 0755)
+	}
+	if err != nil {
+		return err
+	}
+	if !info.IsDir() {
+		return fmt.Errorf("file already exists at %s", path)
+	}
+
+	return nil
+}