Integrates the Yandex Games JavaScript SDK (YaGames) into JavaScript games. Initializes the SDK and lifecycle hooks, manages player authentication and authorization, handles per-player cloud storage, controls ad placements (interstitial, rewarded video, sticky banner), implements in-app purchases and leaderboards, retrieves remote config flags, and supports social features such as review prompts and home-screen shortcuts. Use when the user mentions Yandex Games, YaGames, yandex sdk, deploying a game to the Yandex.Games platform, or integrating features like ads, leaderboards, in-app purchases, or player authentication into a Yandex-hosted JavaScript game.