Support bumping version based on configurable custom pattern

[orhun]

Is there an existing issue or pull request for this?

• [X] I have searched the existing issues and pull requests

Feature description

This is already implemented in next-version here: https://github.com/MarcoIeni/release-plz/pull/1511

Desired solution

What we need to do is add these new fields (custom_major_increment_regex and custom_minor_increment_regex) to the bump configuration in git-cliff.

Alternatives considered

None.

Additional context

See https://git-cliff.org/docs/configuration/bump

[orhun]

Related #718