RFC: Add Support for Set-Related Products

[Aviortheking]

Summary

Introduce a new Product data structure to represent official Pokémon TCG merchandise associated with a specific set (e.g., Elite Trainer Boxes, Booster Bundles, etc.).

Motivation

Some TCG sets have official products listed on Pokemon.com such as Elite Trainer Boxes and Booster Bundles. These products often have unique names, images, and categories. Capturing this data allows richer context for a set and better representation of officially released merchandise.

Proposal

Add an optional products array to the Set schema, containing structured product data. Example interface:

interface Product {
    name: string;
    price?: Language<number>; // Price in cents (e.g., 12€ = 1200), optional due to regional variability
    category:
        | 'Elite Trainer Box'
        | 'Build & Battle Box'
        | 'Build & Battle Stadium'
        | 'Booster Box'
        | 'Booster Bundle';
    images?: Array<{
        url: string;
        background: 'transparent' | 'light' | 'dark';
    }>;
}

Notes:

• price is optional due to localization/vendor variability.
• The number of boosters/cards or bonus items is excluded for now, pending definition of a standardized schema across products.