dsh-messenger-gateway: Multi-Client Message Gateway for DeepSeek Harness

`dsh-messenger-gateway` is a DeepSeek Harness plugin maintained by GooDAnDReaREADY, designed to connect agents with instant messaging platforms such as Telegram. It supports long polling, Webhook mode, and Discord and Slack adapters, and features session isolation, interactive buttons, chart rendering, file management, and voice notes (which depend on ffmpeg). Users can install it via the command line and configure the Telegram Bot Token in the Web interface. This plugin is suitable for developers who need remote operations or multi-platform collaboration, but note that the voice feature depends on ffmpeg and that the Bot Token should be treated as sensitive information.