Move Key Commands doc script out of base repo folder (#16024)
Clean up of #15945
Summary of the issue:
The key commands doc generator script is in the base folder of the repository - it should be moved to a folder to keep the base repo tidy.
I propose it is moved to user_docs - particularly because of its relation to the docs, and the fact that the t2tconf files will be removed.
The documentation for key commands is lacking in the wiki: https://github.com/nvaccess/nvda/wiki/TranslatingUserGuide
The inline documentation in the module covers the syntax more thoroughly and should be moved to project docs.
