Add a way to supply a fallback image to the `Image` component

[fabiankaegy]

Description of the Change

This is an exploration of how we could potentially handle adding a fallback image option to the image component.

Closes #161

How to test the Change

Changelog Entry

Added - Ability to provide a fallback image for the Image component

Credits

Props @ncoetzer @sudar @ajmaurya99

Checklist:

• [x] I agree to follow this project's Code of Conduct.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my change.
• [x] All new and existing tests pass.