A Drupal 9 compatible release

Problem/Motivation

#3119055: 503 Error → might depend on a new release.

Proposed resolution

Remaining tasks

#2176147: [meta] Coding standards review for D8 Examples → I brought one CS violation which should be fixed "js_example/js/accordion.js missing @file"
#3117060: All dependencies must be prefixed with the project name, → (DrupalPractice.InfoFiles.NamespacedDependency)
✨ Adopt Gitlab CI and fix CS violations detected Fixed
#3103520: Move all examples/submodules into the modules folder →

User interface changes

API changes

Data model changes

Release notes snippet