Convert TXT JIRA to PNM

The Jira/Confluence Wiki Markup, often stored with a TXT file extension, referred to as Wiki Markup, is used in Atlassian's Jira and Confluence applications for creating and formatting content. It allows users to write text in a simplified markup language, which is then converted into rich text. This format is particularly useful for documentation, linking to specific parts of pages, and embedding macros. Wiki Markup has been a part of Confluence since its early versions, enabling users to easily manage and organize information.

The PNM (Portable Anymap) file extension, developed by Jef Poskanzer in the 1980s, stands for Portable Any Map. It is an uncompressed raster graphics format designed for portable image storage and exchange, encompassing three sub-formats: PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap). PNM files store image data in plain text or binary format, ensuring easy usage across different platforms and applications. This format is widely supported by various image editing software and is valued for its simplicity and lossless compression.