♻️ Refactor Timestamp Generator to single function with options

gen_ts_test.go

@@ -0,0 +1,15 @@
+package nomino
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTimestamp(t *testing.T) {
+	n := time.Now()
+	st, err := Timestamp()(nil)
+	assert.NoError(t, err)
+	assert.Equal(t, n.Format(FileTimestamp), st)
+}