Create list of modules and configuration steps for how to integrate CCC with Document Loader MDXEditor submodule
## Problem/motivation
Follow-up to:
#3569310
We want to allow users to use a source for their markdown (e.g. MD, PDF, text file, URL). Document Loader has integrated with MDXEditor to make this easy:
[#3580850](https://www.drupal.org/project/document_loader/issues/3580850)
This has been fixed and there's a new release (2.0.1) that includes it.
## Solution
Create explicit step-by-step instructions within this issue (not code) on how to integrate with Document Loader including the list of additional plugin modules, so we can add context from these four sources: MD, PDF, text file, and URL.
## Tasks
- Create instruction steps
- Review and test steps
- Create follow-up issues for docs (might live in DL queue)
- Create follow-up issues for submodules and/or recipes to automate this
## AI usage
- [ ] AI assisted issue
- [ ] AI assisted code
- [ ] AI generated code
issue