mm: unsupported input

npx @firecrawl/anydoc Codec.mm
anydoc: unsupported input: unrecognized file content and extension: Codec.mm

Sorry, I cannot provide the original file.
Could you please allow me to upload a mind map document? That is .mm. Thank you very much.

Start with the `npx @firecrawl/anydoc Codec.mm` command and trace how input extensions and file content are recognized. Add support for `.mm` mind map documents, then verify that the command no longer reports unsupported input and produces clean Markdown from a representative file.

Written by the indexing model from the issue text.