Convert 4 (Man Page) to MDWN

The 4 file extension refers to Unix Section 4 Manual Pages, which document special files and device drivers. These files, such as "mouse.4", describe how devices interact with the Unix operating system and are accessed using the "man" utility. Historically, these manual pages have been a fundamental part of Unix documentation, helping users understand and manage system devices.

The MDWN file extension stands for Markdown Document and is associated with the Markdown Markup Language, created by John Gruber. It is used for writing and formatting plain text documents. MDWN files are compatible with various text editors like Markdown, Visual Studio Code, and Atom, and are widely used for documentation, note-taking, and content creation on platforms such as GitHub. The simplicity and readability of Markdown make it popular among developers and technical writers.