Convert TXT COMMONMARK to TEXT MARKDOWNPHPEXTRA

The TXT file extension is associated with CommonMark Markdown Language, a simplified markup language designed for easy readability and writability. Markdown is widely used in documentation, blogging, and formatting readme files in software development. Introduced in 2014, CommonMark aims to standardize Markdown's diverse implementations. Its clarity and simplicity make it a preferred choice for developers and technical writers seeking to maintain clean, structured documents.

The TEXT file extension, associated with PHP Markdown Extra Documentation, refers to plain text files used to write and store documentation. These files are simple, human-readable, and can be easily converted to HTML using Markdown syntax. The TEXT extension is commonly used for README files, configuration files, and other documentation purposes. Markdown Extra enhances the basic Markdown syntax with additional features like tables, footnotes, and definition lists, making it a powerful tool for creating well-structured documentation.