feat(02-01): integrate Formidable class with plugin

- Added class-formidable.php to autoload in main plugin file
- Hooked setup_registration_hooks() to init action
- Added missing class-roles.php and class-acf-fields.php to autoload
- Ensures Formidable integration runs after Formidable Forms loads

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

includes/class-ddhh-job-manager.php

@@ -52,5 +52,8 @@ class DDHH_JM_Job_Manager {
 
 		// Initialize ACF fields
 		add_action( 'acf/init', array( 'DDHH_JM_ACF_Fields', 'register_fields' ) );
+
+		// Initialize Formidable Forms integration
+		add_action( 'init', array( 'DDHH_JM_Formidable', 'setup_registration_hooks' ) );
 	}
 }