Gnorm supports copying static files from an input directory to the output
directory. Set the StaticDir field in your gnorm.toml to the directory you
would like to copy files from, and those files will get copied to the
OutputDir (which defaults to the directory where Gnorm is running). The
directory layout under StaticDir will be maintained in the output dir, so for
example, if you have <StaticDir>/foo/bar.txt, it will get copied to
<OutputDir>/foo/bar.txt.
This can be useful for a couple purposes - first, it lets you keep non-generated files outside the output directory, so that you can delete and recreate the entire directory. Second, it allows users to distribute gnorm solutions which include templates and non-generated files, similar to how themes are distributed for static website generators.