dsh-provider-qoder: Qoder Subscription Integration Plugin

The DSH plugin `dsh-provider-qoder` is a community-maintained tool designed to connect a Qoder subscription to the DSH platform through standard mechanisms. It supports global and China-region services, with automatic model retrieval, multimodal and web search capabilities, and the ability to view account information and quota. After installing the plugin and configuring a Qoder Personal Access Token, users can save their credentials in the DSH web interface and manage models. Note that the plugin handles authentication and communication only, while the DSH core takes over other functions. When reporting issues, do not submit any personal or private information.