Extend author list

What is the new feature

Add more authors to the author list. !49 (comment 192135)

How is it implemented

The author is achieved from the git shortlog from the master branch of icon-mpim directly before the fortran support library is introduced.

Mandatory steps before review

• Gitlab CI passes (Hint: use make format for linting)
• New feature is covered by additional unit tests
• Mark the merge request as ready by removing Draft:

Mandatory steps before merge

• Reviewed by a maintainer
• Incorporate review suggestions

You are not supposed to merge this request by yourself, the maintainers of fortan-support take care of this action!