burns1028/moa-plus: Add a resident Agent coordinator to DSH

moa-plus (also referred to as Project Mode for DeepSeek Harness within the repository; an unofficial rc.3 developer preview, version 0.1.23; maintainer: Burns1028; workflow classification; MIT license; 5-star rating) delegates the coordination of multi-agent projects to a Coordinator resident in the main session: it derives or reuses Workers, steers and queues work, automatically reclaims the final AI message of each round, and maintains `notes.md`, `archived.md`, and a progressively loaded shared context index under `.dsh/project-mode/<project-id>/`. It relies on three locally compatible extensions audited within the repository and requires DSH 0.2.1-rc.3; the original rc.3 version cannot be activated directly. Initial trials are conducted in a standalone Web environment (Node 24.9+), but native CLI installation is also available. Plugins operate with the permissions of the current DSH process; source code and a patch manifest must be reviewed before installation.