Convert MD GFM to TEXINFO

Markdown (MD) is a lightweight markup language with a file extension MD, commonly used for formatting readme files, documentation, and comments in GitHub repositories. GitHub-Flavored Markdown (GFM) extends the original Markdown's capabilities, adding features like tables, task lists, and auto-linking URLs. Markdown's simplicity and effectiveness in creating formatted text using a plain text editor made it widely adopted in the developer community. GFM, in particular, is optimized for use on GitHub, enhancing collaboration and code documentation.

The Texinfo is a documentation format developed by the GNU Project, created by Richard Stallman and Bob Chassell. It uses plain text files with @-commands to generate both online and printed documentation from a single source. Texinfo files, with the TEXI extension, support various output formats like HTML, PDF, and Info. This system simplifies maintaining consistent documentation across multiple formats.