Comprehensive Improvements for OneDesign Plugin

[vishal4669]

Description

This issue aims to address multiple improvements and fixes required in the OneDesign Plugin to enhance performance, maintainability, and consistency across the codebase.

Tasks

Error Handling and Logs

• Address all existing error_logs issues.
• Fix all 404 and 502 errors.

Code Quality and Standards

• Resolve PHPCS violations across the plugin.
• Add complete documentation to all functions, classes, REST endpoints, and settings.
• Fix plugin checker warnings.

UI/UX & Functionality

• Update the PHP-based settings page to use Gutenberg components.
• Add a modal on plugin activation for site type selection (similar to other modules).
• Add a Settings link on the plugins page for OneDesign to take users to the plugins settings page.

Code Optimization and Structure

• Use Utils and Constants classes for repeated code, options, and transient names.
• Update all dashboard/consumer site references with “Governing Site” and “Brand Site” terminology throughout the codebase.
• Prefix all options with onedesign_ and set autoload = false.

Acceptance Criteria

• No unresolved error logs or 404/502 responses remain.
• Code fully passes PHPCS and plugin checker without warnings.
• Documentation is complete and up-to-date.
• Settings page rebuilt with modern Gutenberg components.
• Activation modal implemented and tested.
• Consistent terminology (“Governing Site”, “Brand Site”) across UI and code.
• All reusable logic consolidated under Utils and Constants.
• Option prefixes and autoload settings verified.