Remove print_list_notes_csv, print_list_notes_jsonl, and csv_escape from
the notes list command. The --format flag's csv and jsonl variants added
complexity without meaningful adoption — robot mode already provides
structured JSON output. Notes now have two output paths: human (default)
and JSON (--robot).
Also removes the corresponding test coverage (csv_escape, csv_output).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>