dsh-plugin-installer: Plugin Marketplace and Profile Switching for DeepSeek Harness

dsh-plugin-installer is a third-party community project maintained by Toukaiteio, designed to provide an integrated plugin marketplace and Profile switching functionality for DeepSeek Harness (DSH). This project is embedded within the DSH Web UI to address the issues of scattered plugins across GitHub and cumbersome installation/update processes. Its core features include: automatically discovering plugin repositories tagged with `dsh-plugin` or `dsh` on GitHub; conducting strict security checks before installation, such as verifying `dsh.bundle.patch` and prioritizing SHA-256 checksummed Release packages; supporting one-click plugin installation, automatic update checks, removal, and cross-Profile management. Additionally,