dsh-lit-search: Academic Literature Search, Citation, and BibTeX Tools

`dsh-lit-search` is a plugin for DeepSeek Harness (DSH) that addresses common challenges in academic literature search and citation management. It integrates Crossref, OpenAlex, and Semantic Scholar, offering a unified command-line interface with four tools: search, citation formatting, batch BibTeX generation, and related reference lookup. The plugin supports multiple citation styles (including Chinese GB/T 7714, APA, and BibTeX), requires no API key for free use, and is suitable for developers building academic research agents or managing references.