Standalone usage
You can use mdbook-rustdoc-link as a standalone Markdown processor from the command
line.
Simply use the markdown subcommand, send your Markdown through stdin, and receive the
result through stdout, for example:
mdbook-rustdoc-link markdown < README.md
The command accepts as arguments all options configurable in
book.toml, such as --cache-dir. Run
mdbook-rustdoc-link markdown --help to see them.