Markdown Attribute Parser

The `md-attr-parser` package, currently at stable version 1.3.0, provides a focused utility for extracting custom HTML attributes embedded within Markdown strings. It parses attribute blocks, typically enclosed in curly braces `{}` immediately following a Markdown element, to retrieve an ID, a list of classes, and arbitrary key-value pairs. The library outputs a structured object containing the parsed properties and the exact substring that was consumed. While there's no stated release cadence, as a specialized parser, updates are typically driven by bug fixes or syntax extensions rather than frequent iterations. Its key differentiators include the ability to start parsing from a specific offset within a string, and a configurable `defaultValue` option for attributes that are present but lack an explicit value, allowing for flexible integration into Markdown processing pipelines.