Convert WIKI VIMWIKI to OPML

The Vimwiki Markup Language (WIKI) is a file extension used for personal wiki files managed by the Vim text editor. Vimwiki enables users to organize notes, manage to-do lists, write documentation, and maintain diaries. It stores data in plain text files with its own markup syntax, which can be exported to HTML. Vimwiki was developed to enhance Vim's functionality by providing a structured way to handle personal knowledge bases and notes efficiently.

OPML, or Outline Processor Markup Language, is a file format utilized primarily for outlining data structures. Initially developed in 2000 by UserLand Software, OPML was designed to facilitate the exchange of outline-based information between different software applications. Its uses have expanded over time, notably in organizing RSS feed lists and managing hierarchical data. The OPML file extension denotes XML-based documents that offer simplicity and interoperability in transferring structured information across diverse platforms. In essence, OPML serves as a versatile tool in the realm of data organization and syndication.