Fix pathIsHidden treating base directory as hidden, print banner to stdout

- pathIsHidden(".") was returning true, causing freshen to skip entire
  directory tree when dotfiles excluded
- Banner now prints directly to stdout to avoid log prefix artifacts

internal/cli/entry_test.go

@@ -173,10 +173,10 @@ func TestBannerOutput(t *testing.T) {
 	exitCode := RunWithOptions(opts)
 	assert.Equal(t, 0, exitCode)
 
-	// Banner ASCII art should be in stderr (via log.Info)
-	stderr := opts.Stderr.(*bytes.Buffer).String()
-	assert.Contains(t, stderr, "___")
-	assert.Contains(t, stderr, "\\")
+	// Banner ASCII art should be in stdout
+	stdout := opts.Stdout.(*bytes.Buffer).String()
+	assert.Contains(t, stdout, "___")
+	assert.Contains(t, stdout, "\\")
 }
 
 func TestUnknownCommand(t *testing.T) {