// Package output formats ExploreDNS traversal results for human-readable text
// and machine-readable JSON output.
//
// The Formatter interface is the single point of contact for the traversal
// engine.  Two implementations are provided:
//
//   - text formatter (default) — coloured, human-readable output.
//   - JSON formatter (--json flag) — structured JSON suitable for piping.
//
// NewFormatter selects the right implementation based on Config.Format.
// RunTraversal is the high-level entry point: it attaches event hooks,
// executes the traversal, fingerprints encountered servers, and writes the
// final summary and flush.
package output