Feature request: run files in succession

[dlesbre]

I'm writing a fairly long tutorial using mld files and would like to check the code blocks in mdx. Unfortunately, if I split my tutorial in multiple files, it does not seem possible to have one file pick up where the a previous file left off. It would be nice to have this feature, for example with a special syntax in the dune stanza:

(mdx
   (files (sequence chapter1.mld chapter2.mld) file_not_in_sequence.md))

One workaround is to move all my code to a separate .ml file and then have the code blocks synced to that file via the file-sync option. However, this doesn't work if I wish to have toplevel output among my code blocks.