Docs needed: Dust updates

[samsrabin]

What sort(s) of issue is this?

• [x] Something is missing.
• [x] Something is (or might be) incorrect.
• [ ] Something is confusing.
• [ ] Something is broken.

What part(s) of the documentation does this concern?

• [x] Technical Note (science and design of the model)
• [x] User's Guide (using the model and related tools)
• [ ] Somewhere else (e.g., README file, tool help text, or code comment): Please specify
• [ ] I don't know

[dmleung]

Hi @samsrabin, after months of work I am close to finishing a new documentation for the dust emissions module. I wanted to let you know that it is about to be ready for a PR. Shall I proceed and create a draft PR for it? Thanks

[samsrabin]

Nice! Yes, please go ahead. Once it's ready for review, tag me and mark it as "ready for review" (instead of draft). Thanks!

[dmleung]

Thanks! Will do it these few days.