Feature request — proportional or configurable image display sizing in markdown output

Marker's image export quality is good (high-resolution exports preserve legibility of dense screenshots/code boxes), but the markdown output references images at their native/full extraction resolution with no sizing hint. In practice this means images often render oversized relative to surrounding body text in common markdown viewers/renderers, even though the underlying export quality is exactly what's wanted.

Ask: a config option to either (a) emit an explicit width/height (or percentage) hint in the generated markdown/HTML image tag, computed proportionally to the page's text layout, or (b) at minimum document a recommended pattern for downstream consumers to apply their own sizing without losing the high-res source. Either would let consumers keep full export quality while controlling display size, instead of choosing between "oversized" and "re-processing the image."

Environment: marker-pdf==1.10.2.

Related: #1091, #1092 (this repo's other reports from the same test document).