Add OneCite - Universal citation management toolkit

[HzaCode]

Hi! I'd like to add OneCite to the awesome-shell list.

OneCite is a universal citation management toolkit that automates the tedious process of citation management. It's a powerful command-line tool that:

• Converts DOIs, arXiv IDs, paper titles, GitHub URLs, and more into clean bibliographic entries
• Outputs in multiple formats: BibTeX, APA, MLA
• Integrates with AI assistants via Model Context Protocol (MCP)
• Features a 4-stage pipeline for high-accuracy citation processing
• Queries 9+ academic databases (CrossRef, Semantic Scholar, OpenAlex, PubMed, arXiv, etc.)

Stats:

• PyPI: https://pypi.org/project/onecite/
• Documentation: https://hzacode.github.io/OneCite/
• MCP Registry: Listed in the official Model Context Protocol registry
• Downloads: 1000+ on PyPI

Example usage:

# Install
pip install onecite

# Process mixed-format references
echo '10.1038/nature14539' > refs.txt
onecite process refs.txt -o results.bib

Perfect for researchers, students, and anyone working with academic citations from the command line!