Explain the changes made in 3.0.0-alpha1

Released https://www.drupal.org/project/allowed_formats/releases/3.0.0 → with requested release notes. I've also updated the module's front page with (I hope) all details.

Setting this as fixed.

Let me see if I have the directions correct to upgrade from 9 to 10:

1. composer require from 8.x to 2.x
2. updb
3. config export
4. composer require drupal core to 10.1
5. updb
6. config export
7. compsoer require from 2.x to 3.x
8. updb
9. config export

Automatically closed - issue fixed for 2 weeks with no activity.