Transformed IEEE1800-2023 grammar syntax to BNF and Zim doc

Over the last days of 2025, some effort has been made to copy the grammar syntax from appendix A to a BNF file and a Zim document structure.

The BNF file will be used by a tool to create a graph of the language.

The Zim document is used to make notes regarding the function of each element.

https://github.com/dehekkendekrekker/ieee1800-2023-tests/