dsh-godot-ai: Godot Game Development Mode for DeepSeek Harness

The DeepSeek Harness (DSH) plugin `dsh-godot-ai` introduces a **Godot Creator** mode for Godot development, designed to automate the end-to-end workflow of scene construction, script writing, UI creation, and runtime verification with AI. The plugin relies on the original Godot AI backend. Users must first install Godot 4.5+ and the Godot AI 3.1.5 plugin, then create a new session in DSH and select this mode to use it. Its core capabilities include project operations, asset creation, and debugging/verification, and it supports Skill marketplace management. The plugin is released under the MIT license and is designed specifically for Godot developers.