Migrate procedural hooks to OOP #[Hook] attributes with #[LegacyHook] backward compatibility

This patch migrates all 19 procedural hook implementations across the main module and both sub-modules to OOP classes using Drupal 11's #[Hook] attribute pattern, with #[LegacyHook] stubs in .module files for Drupal 10.3+ backward compatibility.

Changes

New hook classes (main module):

• src/Hook/WebformWorkflowsElementHooks.php — 5 hooks: webform_submission_view, webform_element_access, webform_submission_presave, webform_submission_access, entity_operation_alter
• src/Hook/EntityTypeHooks.php — 1 hook: entity_type_alter (isolated to prevent circular service dependency)
• src/Hook/FormHooks.php — 3 hooks: form_alter, webform_element_webform_workflows_element_alter, webform_submission_form_alter + static form callbacks
• src/Hook/ThemeHooks.php — 1 hook: theme + template_preprocess_webform_workflows_element_value
• src/Hook/TokenHooks.php — 2 hooks: token_info, tokens
• src/Hook/ResultsFilterHooks.php — 4 hooks: form_webform_submission_filter_form_alter, webform_better_results_query_alter, webform_better_results_form_alter, webform_better_results_submit_alter

New hook classes (sub-modules):

• modules/webform_workflows_element_views/src/Hook/ViewsHooks.php — 1 hook: views_data
• modules/webform_workflows_element_maestro/src/Hook/MaestroHooks.php — 2 hooks: task_console_interactive_link_alter, execute_title

Deleted .inc files (contents merged into .module):

• webform_workflows_element.tokens.inc
• webform_workflows_element.results_filter.inc
• webform_workflows_element.logs.inc
• webform_workflows_element.colors.inc

Deprecated helper functions: All non-hook procedural functions remaining in .module are marked @deprecated in webform_workflows_element:2.1.0 and is removed from webform_workflows_element:3.0.0.

Circular dependency fix: hook_entity_type_alter is isolated in its own EntityTypeHooks class (depends only on @module_handler) to avoid a circular reference through the webform_workflows_element.manager service during entity type discovery.

Updated: WebformSubmissionWorkflowListBuilder now calls ResultsFilterHooks via the service container instead of the procedural function directly.

Backward compatibility

Each procedural hook in .module files is retained as a #[LegacyHook] stub that delegates to the corresponding service class. All hook classes are explicitly registered in services.yml for Drupal 10.x compatibility (where HookCollectorPass is not available).