dsh-objection: Objection Handling Plugin

`dsh-objection` is a DeepSeek Harness plugin maintained by `uckkk`, designed to address logical gaps that agents may encounter when handling user objections. Built with pure Node.js and requiring no network dependencies, it provides structured objection-handling approaches and recommendations tailored to specific scenarios. It depends on DeepSeek-related toolkits and is suitable for users who need to implement stable response strategies in development use cases.