dsh-plugin-guard: DeepSeek Harness Plugin Security Checkup

`dsh-plugin-guard` is a plugin security health-check tool for DeepSeek Harness, designed to identify risks in third-party plugins. It performs tiered plugin assessments through static code scanning, dependency review, AI-powered online auditing, and SafeSkill platform scanning. The tool can detect dangerous APIs, credential leaks, permission declaration mismatches, and supply chain risks, and presents results via a green/yellow/red dashboard. Plugins support version monitoring and alerts, helping developers identify potential security threats before introducing a plugin or during regular security inspections.