dsh-claude-marketplace: Load Claude Code assets as DSH Skills

`ben7am1n/dsh-claude-marketplace` is a Claude Code compatible layer plugin for DeepSeek Harness (DSH), designed to enable DSH to directly reuse skills, commands, and agents from the project's `.claude` directory or the Claude Code marketplace, eliminating the need to maintain separate invocation methods. The plugin loads components from various sources—including local paths, GitHub, and URLs—via tool entry points such as `cc_scan` and `cc_marketplace_add`, registering them as native DSH skills with a `cc-` prefix. It is installed using the `dsh plugin` command and supports configuration of a cache directory.