Group commit messages by scope

[maxnyby]

Describe the feature

If feats or fixes contain multiple commits in the same scope, it would be nice if they were grouped together under a common heading, or maybe just sorted together in the output.
I think it would make it easier for a consumer to visually parse which parts a version is touching on.

Example

In stead of this:

### 🩹 Fixes
Fixed some typos in code comments. (123456)
**UI:** Changed the background to use our brand color. (123457)
**Tests:** Fixed a regression due to a bad test case. (123458)
**UI:** Added proper padding between navbar and content. (123459)

This would be nice:

### 🩹 Fixes
Fixed some typos in code comments. (123456)

#### UI
Changed the background to use our brand color. (123457)
Added proper padding between navbar and content. (123459)

#### Tests
Fixed a regression due to a bad test case. (123458)

Additional information

• Would you be willing to help implement this feature?