feat: add list command with global filters

internal/output/factory.go

@@ -0,0 +1,21 @@
+package output
+
+import "fmt"
+
+// Format identifiers mirrored from listing package to avoid import cycle.
+const (
+	FormatTable = "table"
+	FormatPlain = "plain"
+)
+
+// NewFormatter selects the appropriate renderer based on format key.
+func NewFormatter(format string) (Formatter, error) {
+	switch format {
+	case FormatPlain:
+		return NewPlainFormatter(), nil
+	case FormatTable, "":
+		return NewTableFormatter(), nil
+	default:
+		return nil, fmt.Errorf("unsupported format %q", format)
+	}
+}