Convert the procedural hooks to OOP hook classes in the Varbase Core module

Problem/Motivation

The Varbase Core module implements its hooks as procedural functions in varbase_core.module and varbase_core.tokens.inc. Drupal 11 provides object-oriented hooks via the #[Hook] attribute (change record), which are autoloaded and support dependency injection — the recommended pattern for Drupal ~11.4.0.

Proposed resolution

Move all hook implementations (hook_form_node_form_alter, hook_form_alter, hook_template_preprocess_default_variables_alter, hook_modules_installed, hook_email_registration_name_alter, hook_token_info, hook_tokens) into an object-oriented hook class Drupal\varbase_core\Hook\VarbaseCoreHooks using the #[Hook] attribute, with the config factory, class resolver, request stack and theme manager injected via the constructor. The varbase_core.module and varbase_core.tokens.inc files are removed.

Remaining tasks

• ✅ Add src/Hook/VarbaseCoreHooks.php
• ✅ Remove varbase_core.module and varbase_core.tokens.inc
• ✅ Reviewed by a human
• ✅ Release varbase-9.2.0, varbase_core-9.2.0

User interface changes

None.

API changes

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

Data model changes

None.

Release notes snippet

• Released in varbase_core-9.2.0