~~Link commits in changelog~~ add `plugin_path` option to enable loading local plugins

Description

Add the ability to link a changelog message to the original commit. This would greatly increase the ability to provide context around changes.

Possible Solution

Ability to add a changelog option, so when generating a changelog, it would just add links in the generated markdown for the associated commit message.

After https://github.com/commitizen-tools/commitizen/issues/396#issuecomment-878673634, we decide adding a plugin_path might be a good solution for it.

[woile]

As of now the changelog provides some flexibility. Extra functionality like sending slack messages, customizing what is shown in the changelog, like emojis, github links, etc are considered out of the scope of the flexibility we can provide. You could create a new custom changelog with the github commits and list it in the third party section, we have a template (which needs some love 😕)

I think the design could be improved, but we don’t have the capacity at the moment, sorry for that.

[woile]

Hello! This can be achieved using a custom hook. https://commitizen-tools.github.io/commitizen/customization.html#custom-changelog-generator You can use changelog_message_builder_hook

In the example you can see the commit author is being added to each commit, the same can be done for commits:

def changelog_message_builder_hook(self, parsed_message: dict, commit: git.GitCommit) -> dict:
        rev = commit.rev
        m = parsed_message["message"]
        parsed_message["message"] = f"{m} {rev} [{commit.rev}](github.com/project/{commit.rev})"
        return parsed_message

I don’t think it makes sense to add links, because if we add github link any other git server (gitlab, bitbucket, etc) would have to have something similar.