[Feature Request] Add a callback like formatMessageCB for every step

[SuiKaSan]

💭 Describe the feature

Add a callback like formatMessageCB for every step.
Like if I selected a scope, then triggers a callback to customize the type or the following subject.

In my case, I need to write a commit meesage for every version release with a scope called version.
So I have to type "release version xxx" every time I wirte a version related commit.
It's annoying but I can't just left it empty.

defaultSubject will fix the problem but everyone write a commit would see the default subject, that's not good.

💡 Proposed Solution

A callback to every step would be nice, so the subject can be altered.
Like if I know the coming scope is version, then change the defaultSubject to "release version ", if not, then leave it empty.

It's just a feature nice to have.
And thank you very much for developing this library, it's crazy good!

[Zhengqbbb]

e.g ?

build(version): release xxx version

Each step provides a callback Fn, Emmm I will not add similar configurations for special requirements to avoid increasing complexity.
You can provide some examples and cases for us to analyze and see if we can handle them well with the existing configurations.

---

release version xxx

1. Replace scope based on special type

https://cz-git.qbb.sh/config/engineer#scopeoverrides
👇
type select build => only scope version => type xxx => using callback Fn gen template message build(version): release xxx version

2. I wonder if this kind of commit is only needed when there is a release version, so this scenario should be other CLI like bumpp, rather than using CLI cz czg.

cz-git/package.json

Lines 44 to 45 in 328fb2e

	"release": "run-s lint test:run release:bump release:publish",
	"release:bump": "bumpp -r --all --commit 'build: :bookmark: publish v%s' -x 'npm run release:bump:post'",