Tutorial: Automate releases and release notes with GitLab

What this post added

This post introduces the automation of release notes and changelogs using GitLab's Changelog API and commit trailers. It details how to configure a CI/CD pipeline with a `release` job and a `prepare_job` that calls the Changelog API to generate release notes based on commit trailers. The post also explains the use of semantic versioning for tags and the `release-cli` for creating releases with assets. It demonstrates how to add 'Changelog: added' and 'Changelog: removed' trailers to commit messages and how these are parsed to generate structured release notes and changelogs.