Enable custom mdx formatting options

[w-a-t-s-o-n]

One thing I've noticed since using Mintlify is that if I want to set specific linting/formatting rules for my mdx files in the repo, I don't have a way to propagate that to the web editor.

For example, I use mdxlint in my monorepo for all *.mdx files (not just Mintlify app). I then use lint-staged to ensure that before a commit goes through, it is properly linted/formatted using my mdxlint config settings.

However, if I go to the web editor and make changes to a file that aren't the correct format, those will go through to the PR since I can't tell it to run my format script or use lint-staged. Currently, I've set up a GitHub Action workflow in my repo to detect commits from the Mintlify web editor, then run my format script and push up another commit. Which is fine, but it would be so much better to just supply a script or config to Mintlify so that it would handle that before committing to the branch.

The two avenues that make the most sense to me:

1. Add setting in Mintlify to run a script in the repo before doing a commit. In my case, I have a format:mdx script which runs mdxlint . --output. I'm not familiar enough with the Mintlify build process to know if it would be able to install the dependencies in my repo before running, so that could be a hurdle.
2. Natively support mdxlint (or a similar tool, but not Prettier since the mdx support is poor), then either detect a config in the repo connected to the app, or allow me to enter in a config in the settings.