[D8] Consent Manager

I reviewed the code and I didn't see any security issues. The placeholders used for t() are correct.

I noticed just two typos in the help text, but obviously those aren't application stoppers.

1. The consentmanager.net CMP (Consent Management Provider) allows your to easily collect consent form your websites visitors => The consentmanager.net CMP (Consent Management Provider) allows your to easily collect consent from your websites visitors
2. Login to your consentmanager.net account. => Log in to your consentmanager.net account. (Log in is the verb, login the substantive.)

Thank you for your contribution! I am going to update your account.

These are some recommended readings to help with excellent maintainership:

• Dries' post on Responsible maintainers
• Best practices for creating and maintaining projects
• Maintaining a drupal.org project with Git
• Commit messages - providing history and credit
• Release naming conventions.
• Helping maintainers in the issue queues

You can find more contributors chatting on the IRC #drupal-contribute channel. So, come hang out and stay involved.
Thank you, also, for your patience with the review process.
Anyone is welcome to participate in the review process. Please consider reviewing other projects that are pending review. I encourage you to learn more about that process and join the group of reviewers.