marque 0.2.0

Classification marking linter, formatter, and fixer
marque-0.2.0 is not a library.

marque — classification marking linter, formatter, and fixer.

Phase 3 brings the check subcommand fully into compliance with contracts/cli.md: stdin sentinel, --config, --confidence-threshold, --format human|json, --no-color (with NO_COLOR/TERM=dumb honored), -q/-v, --explain-config (mutually exclusive with paths and fix), and exit codes per the contract.