Initial release of LaTeX Metrics GitHub Action

This repository provides a GitHub Action for automatically extracting and summarising key metrics from LaTeX projects, including word count, document structure, formatting details, reference style, citation count, and author/title information. The action is stable and self-contained, requiring no third-party Python dependencies, and is designed for easy integration into any LaTeX-based workflow. It generates a concise and readable summary directly in your repository’s README.md.