Set up changelog for automatic release note

What is the new feature

Add changelog automation

How is it implemented

Now we have our first release, I propose that we start keeping track of the changelogs.
This MR sets the changelog templates that would be automatically added when a release tag is created.
We would have to edit the squashed commit message and choose a changelog category for the release-bot to grab the message.
Here and here are references for the method.

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
• Remember to edit the commit message and select the proper changelog category (feature/bugfix/other)

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