Markdown-it Abbreviation Plugin

This package provides an abbreviation (`<abbr>`) tag plugin for the `markdown-it` markdown parser. It allows users to define abbreviations in their markdown content using a syntax similar to PHP Markdown Extra (e.g., `*[HTML]: Hyper Text Markup Language`), which are then rendered into proper HTML `<abbr>` tags with `title` attributes. The current stable version is 2.0.0. As a specific-purpose plugin for `markdown-it`, its release cadence is typically tied to `markdown-it`'s own updates or specific feature additions/bug fixes for the abbreviation parsing itself. Its key differentiator is its seamless integration with the `markdown-it` ecosystem, offering a standardized way to extend markdown parsing functionality without manual HTML manipulation. It does not support multi-line abbreviation definitions. The package is actively maintained, ensuring compatibility with newer `markdown-it` versions and addressing reported issues.