Git rid of 'Hook Event Dispatcher' module depenecy

Thanks for the patch.

Please make coding standards fixes.

Thanks, CS have been fixed

Why do the legacy hooks return values? The documentation for these hooks does not say that anything should be returned. If so, they should have the void return type declared.

Please rebase and remove the legacy hooks. This branch now has core_version_constraint: ^10.4 || ^11.1.

Without legacy hooks it won't work for Drupal from 10.1 to 11.0. So it cannot be supported in ^10.4 because this feature is landed in 11.1.
If we want to get rid of legacy hooks, then we need to use core_version_requirement: ^11.1 and remove 10.4 from core requirements.

OK, it will need to keep the legacy hooks. Thanks