Convert the procedural hooks to OOP hook classes in the Varbase profile

Problem/Motivation

The Varbase profile implements hook_toolbar_alter() as a procedural function in varbase.profile. Drupal 11 provides object-oriented hooks via the #[Hook] attribute (change record), which are autoloaded and support dependency injection.

Steps to reproduce

Review varbase.profile: hook_toolbar_alter() is a procedural function.

Proposed resolution

Move the runtime hook_toolbar_alter() implementation into an object-oriented hook class Drupal\varbase\Hook\VarbaseHooks using the #[Hook] attribute, with the current user injected via the constructor. The install-phase hooks (hook_install_tasks, hook_install_tasks_alter, hook_form_install_configure_form_alter), hook_requirements() and the install task callback helpers are kept procedural, since they run in the minimal installer environment.

Remaining tasks

• ✅ Add src/Hook/VarbaseHooks.php (toolbar_alter)
• ✅ Reduce varbase.profile
• ➖ Keep install-phase hooks + hook_requirements procedural
• ✅ Reviewed by a human

User interface changes

None.

API changes

None. Standard hook invoked by core only; see the OOP hooks change record.

Data model changes

None.

Release notes snippet

Converted the Varbase profile hook_toolbar_alter() implementation to a Drupal 11 object-oriented hook class.

Release notes snippet

• refactor: #3608347 Convert the procedural hooks to OOP hook classes in the Varbase profile