dsh-store: DeepSeek Harness Plugin Directory and One-Click Installation Entry

dsh-store is a plugin store for DSH (DeepSeek Harness), used to aggregate catalogs, verify quality, install/uninstall, and manage plugins. It handles installation targets through the official `dsh plugin add/remove` command, supports background validation of whether `package.json` contains a `dsh` field to filter out noise, and ensures plugins align with the current profile. Core features include: 1. **Catalog aggregation and filtering**: Integrates sources such as the npm registry, curated awesome lists, automatic radar, and GitHub stars, supporting search, categorization, and sorting by stars/latest/name, with README summaries displayed. 2. **Installation and uninstallation**: Prioritizes official commands, falling back to pnpm when they fail.