Paper-cut polish: --color, --config, --quiet, exit code docs

[jakekaplan]

Summary

Small UX improvements that make loq feel polished and complete.

Items

1. --color auto|always|never

Standard color control flag.

• auto (default): detect TTY
• always: force colors (useful for CI that supports ANSI)
• never: no colors (useful for piping)

2. --config <path>

Override config file location.

loq check --config /path/to/loq.toml src/

Useful for:

• Monorepos with multiple configs
• Testing config changes
• CI with non-standard layouts

3. --quiet / -q

Suppress all output except errors. Exit code indicates pass/fail.

loq check --quiet src/ && echo "All good"

4. Document exit codes in --help

Add to help output:

EXIT CODES:
    0    All checks passed
    1    Violations found
    2    Runtime error

Tasks

• Add --color flag with auto/always/never
• Add --config flag
• Add --quiet / -q flag
• Add exit codes section to --help
• Tests for each flag
• Update README