Feature request: Pass all image props to custom image loader

[DuckThom]

Goals

Adding the ability to use other props (primarily: height) in the CDN url.

Non-Goals

No response

Background

Our primary use-case for this would be to be able to pass the height to the Contentful CDN url in addition to the width and quality.
We make use of image focal points in Contentful which require an additional height in the request to function properly.

For reference, setting a focal point allows the image resizer to track a specific point of the image when cropping.

Proposal

The end goal would look something like this:

I can take a shot at trying to implement this, however I would need some pointers where to start as this repo seems quite humongous and I have no clue where to start looking...