Multiple output formats (table/yaml/csv)

[rodaddy]

Add --format flag for human-readable output during debugging.

• --format json (default, current behavior)
• --format table (ASCII table for terminal)
• --format yaml (readability)
• --format csv (piping into scripts)

JSON remains default for agent consumption.

Requirement: ADV-03

[rodaddy]

Already fully implemented. src/format/ has csv.ts, table.ts, yaml.ts, ndjson.ts with formatOutput() dispatcher. Wired into tool-call.ts via --format flag. Tests in tests/format/ cover all formats.