Convert HWPX (Hanword) to TEXINFO

HWPX (Hangul Word Processor XML) is an advanced document format used by Hanword, developed by Hancom. It serves as an XML-based alternative to the proprietary HWP format, enhancing interoperability and accessibility. Introduced to improve document structure and compatibility, HWPX enables easier data exchange, integration with various applications, and better support for modern document processing workflows. It is widely used in South Korea for official documents, offering structured content representation while maintaining the rich formatting capabilities of Hanword.

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.