Add Commerce Abilities to extrachill-shop

[chubes4]

Summary

Add comprehensive e-commerce abilities to extrachill-shop plugin to support the API delegation wrapper architecture.

Current State

• extrachill-shop handles WooCommerce integration but has no Abilities API integration
• Product, order, shipping, and payment operations called directly from API routes
• No structured ability interface for commerce operations

Required Abilities to Add

• extrachill/shop-products: Product management and catalog operations
• extrachill/shop-orders: Order processing and management
• extrachill/shop-shipping-address: Shipping address management
• extrachill/shop-shipping-labels: Shipping label generation
• extrachill/shop-stripe-connect: Stripe Connect integration for artist payouts
• extrachill/shop-stripe-webhook: Stripe webhook processing
• extrachill/shop-product-images: Product image management
• extrachill/shop-taxonomy-counts: Product category/tag statistics

Implementation Details

• Add ability registration in inc/core/abilities.php (create if doesn't exist)
• Register extrachill-shop category for commerce-related abilities
• Each ability should have proper input/output schemas matching WooCommerce expectations
• Maintain existing WooCommerce integration logic but expose through Abilities API
• Include permission callbacks with appropriate e-commerce access controls

Example Ability Registration

wp_register_ability(
    'extrachill/shop-products',
    [
        'label' => __('Manage Products', 'extrachill-shop'),
        'description' => __('Create, read, update, and delete WooCommerce products'),
        'category' => 'extrachill-shop',
        'input_schema' => [
            'type' => 'object',
            'properties' => [
                'action' => ['type' => 'string', 'enum' => ['create', 'get', 'update', 'delete']],
                'product_id' => ['type' => 'integer'],
                'product_data' => ['type' => 'object', 'description' => 'WooCommerce product data']
            ],
            'required' => ['action']
        ],
        'output_schema' => [
            'type' => 'object',
            'properties' => [
                'product_id' => ['type' => 'integer'],
                'product' => ['type' => 'object'],
                'success' => ['type' => 'boolean']
            ]
        ],
        'execute_callback' => 'extrachill_shop_ability_products',
        'permission_callback' => 'extrachill_shop_can_manage_products'
    ]
);

Success Criteria

• All commerce abilities registered and functional
• Existing WooCommerce functions preserved but exposed through abilities
• Abilities can be called directly by API plugin for delegation
• Proper integration with Stripe Connect and webhook processing

Dependencies

• Requires WordPress 6.9+ with Abilities API support
• Requires WooCommerce plugin to be active
• Should maintain backward compatibility with existing direct calls
• Requires Stripe Connect configuration for payment abilities