Add Twig helper to resolve Canvas image URLs to Drimage data

Problem/Motivation

Canvas image shapes require resolving image URLs into a structured Drimage data array.
The current image rendering in image.twig expects a helper that converts Canvas-provided URLs into Drimage-compatible data, but such helper is not available in Varbase Media.

This results in:

• Canvas image shapes not rendering correctly
• Missing responsive image handling
• Inconsistent image rendering between Canvas and normal media usage
• Twig logic duplication when attempting to resolve Drimage data

Steps to reproduce

1. Use a Canvas component that renders an image shape.
2. Pass an image URL from Canvas data.
3. Render using image.twig.
4. Image data is not resolved into Drimage format.
5. Image rendering fails or lacks responsive behavior.

Proposed resolution

Provide a new Twig helper:

varbase_media_drimage()

The helper:

• Accepts Canvas image URL input
• Resolves media/file reference
• Builds Drimage-compatible data array
• Returns structured image data for image.twig

This allows image.twig to consistently render Canvas images using Drimage.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ❌ Release varbase-11.0.0-alpha1, varbase_starter-1.0.0-alpha1, varbase_media-11.0.0-alpha1

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• feat: #3587340 Add Twig helper to resolve Canvas image URLs to Drimage data