feat(cz-commitlint): add exclamation mark support for breaking changes (#4655)

Opt-in via prompt.settings.useExclamationMark (default: false). This
reserves one header character for '!' during subject length validation,
regardless of the isBreaking answer.

See: https://www.conventionalcommits.org/en/v1.0.0/#summary

Co-authored-by: Martin T. <mrt181@gmail.com>