dsh-meeting-prep: Pre-Meeting Preparation

The `dsh-meeting-prep` plugin introduced by DeepSeek Harness (DSH) is designed to address the needs for meeting preparation calculations and documentation organization in agent workflows. Maintained by developer uckkk, it provides the `meeting_prep` tool and supports structured output. Installation requires running `dsh plugin add github:uckkk/dsh-meeting-prep`. The plugin is implemented purely in Node, has no network dependencies, but requires specific versions in the local environment. It leverages DSH's plugin mechanism to help developers automate complex pre-meeting preparation tasks.