Fix max-width img for files not lazy loading

What does this MR do and why?

This MR fixes an issue (identified by this HN comment) with image widths in non-markdown files. Here's an example on .com.

Screenshots or screen recordings

Before	After	After (markdown still works)

How to set up and validate locally

1. Upload a large image to a project repo

2. Create a .org file referencing with content like:

   ** The image
   
   [[file:path/to/wide_image.jpg]]
   

3. Open the newly created .org file. The image should be rendered but constrained to the file container.

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.