P1B: Refactor (script/raw-changelog.ts: 198>): Function with high complexity (count = 24): format

### Uniqueness check

- [x] I have searched open issues and confirmed this **file + smell** is not already taken.

### Full path to the Typescript file

script/raw-changelog.ts

### Function(s)/scope targeted

format()

### Relevant Qlty output

```shell
script/raw-changelog.ts
 198  Function with high complexity (count = 24): format
```