Issue Check

• I have checked existing Issues and I feel this feature request has not been raised

Is your feature request related to a problem?

If I understand the current implementation correctly, both the carousel and gallery shortcodes output images using their original file size without Hugo resizing or compression.
This is suboptimal for image heavy websites, especially on low-bandwidth connection or limited data plans.

It might therefore be beneficial to consider adding optional responsive image processing to both shortcodes.

Describe the solution you'd like

From quick and dirty testing using Hugo image processing, for example:

{{ $small := $imgResource.Resize "400x" }}
{{ $large := $imgResource.Resize "1200x" }}
<img
src="{{ $large.RelPermalink }}"
srcset="{{ $small.RelPermalink }} 400w,
{{ $large.RelPermalink }} 1200w"
sizes="(max-width: 600px) 100vw, 1200px"

it appears that generating resized variants significantly reduces file size and improves loading performance.

Describe the alternatives you've considered

No response

Additional context

No response

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