dsh-better-model-select: Real-Time Model List Sync and Usage Badges

`dsh-better-model-select` is a DSH plugin designed to address delayed model list updates and the lack of usage monitoring. **Core Features:** 1. **Real-time model list synchronization**: By periodically reading the configuration and requesting the API, it updates the model list every 30 minutes. It supports merging remote and local definitions, ensuring that new models are immediately available. 2. **Usage monitoring and display**: It uses the RPC channel to fetch and display each Provider's usage in real time (such as GLM coding usage and DeepSeek balance), and applies color coding based on the remaining amount (>30%: green, ≤30%: orange, ≤10%: red). **Features:** * Supports manual synchronization and forced refresh. * Credentials are resolved through the DSH database to ensure security; failures are only logged.