[enhancement] add an option to ignore some commits

[BobAnkh]

Is your feature request related to a problem? Please describe

Some commits like docs(changelog): xxxx should be ignored and not appear in changelog.

Description of the new feature/enhancement

When add some thing like <type>(<scope>), e.g.docs(changelog), to this option, it will be used as an regex to match the commit message to decide if ignore it.

Proposed technical implementation details (optional)

As above.

Additional context

[issue-label-bot[bot]]

Issue-Label Bot is automatically applying the label enhancement to this issue, with a confidence of 0.99. Please mark this comment with :thumbsup: or :thumbsdown: to give our bot feedback!

Links: app homepage, dashboard and code for this bot.

[gitmagic-app[bot]]

All sorted. :thumbsup:

[gitmagic-app[bot]]

Everything looks good :thumbsup: