feat: output system — table/json/yaml/raw printers with struct tag driven tables

internal/output/yaml.go

@@ -0,0 +1,13 @@
+package output
+
+import (
+	"io"
+
+	"gopkg.in/yaml.v3"
+)
+
+func printYAML(w io.Writer, data any) error {
+	enc := yaml.NewEncoder(w)
+	enc.SetIndent(2)
+	return enc.Encode(data)
+}